Projects

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This page maintains a list of academic, personal, and small non-commercial operating systems. For information regarding commercial or main-stream operating systems visit Wikipedia.

The type of operating systems listed here have a high mortality rate. This list was off-line from 09-04-2004 until 06-17-2006 and during that time 112 of 213 operating system projects disappeared from the internet leaving only 101(submitted). Looking at how often these projects are started by using the OS Project Announcement forum we can see that between 11-24-2004 and 6-21-2006 around 68 projects were announced(many of which disappeared before being added here). The current total is 183 projects (as of 10:21, 7th December 2009 (GMT+12)). Please help keep this list current by correcting it yourself if you have a login id or by posting a message on the OSDevWiki forum pointing out the incorrect entry.

Contents: A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

A

A2

It is an operating system and an integrated software environment developed at ETH in Zürich. It is a single-user, multi-core, multi-tasking system that runs on bare hardware or on top of a host operating system (currently Microsoft Windows or Linux). The developers aim at producing a reliable, real-time operating system suitable for embedded systems and for industrial and in particular medical applications. Earlier, A2 was called “Aos” (Active Object System), a nomenclature that is still in use. It is written in the Active Oberon programming language, which evolved from Oberon, a programming language in the Pascal/Modula tradition. The graphical user interface is referred to as “Bluebottle”. See also: Oberon Operating System on Wikipedia and Lukas Mathis' Blog: Ignore the Code.

Icon phone.png http://www.ocp.inf.ethz.ch/forum/
Icon site.png http://www.ocp.inf.ethz.ch/wiki/Documentation/Front
Icon time3.png active

Acess2

Acess2 is a kernel and operating system designed to do what Linux does, be customizable to any given situation. However, unlike Linux, it there is no need to maintain backwards compatibility with anything (yet). It features a simple, but extensible VFS that currently supports VFAT and Ext2, IPv4/IPv6 networking with TCP/UDP, USB input and storage.

Icon phone.png thePowersGang
Icon site.png http://www.mutabah.net/acess2/
Icon time3.png January 21, 2014 -- Version 0.15

Adelian

A desktop OS based on our RTOS (MDOS). Designed from scratch, this completely modular OS features a GUI, CLI, VFS, sound etc etc.

Icon phone.png Gary Partis, info@adelian.co.uk
Icon site.png http://www.adelian.co.uk
Icon time3.png -- Complete nano-kernal plus many completed modules

Amiga Research Operating System,

AROS aims to create a free open source AmigaOS like OS and make it better then the original.

Icon phone.png Ola Jensen(ola AT aros.org)
Icon site.png http://www.aros.org
Icon time3.png

The Apollo Project

The Apollo project is a microkernel designed for maximum portability. Closely following the UNIX Philosophy without being unix itself. The Project has been active for about 6 years, with about 8 complete code rewrites along the way.

Icon phone.png nick@primis.org
Icon site.png https://github.com/primis/Apollo
Icon time3.png 15, 2014 -- Alpha Testing of Code rewrite. No functionality to speak of other than VGA output.

Aprom

Aprom is a weird, modular 32bit OS. Tightly bound design, roughly microkernel. Been in development every now and then over the past decade. A spontaneous fusion of a large algorithms library.

Icon phone.png artlav at OSDev forum
Icon site.png http://orbides.1gb.ru/aprom.php
Icon time3.png -- Stuff from kernel to big stable programs present, but hardware support is lousy. Continually developed.

AtlantisOS

Currently in redesign and reimplementation (3rd time's a charm right?) the new version supports the Bochs VBE adapter and IDE devices. It boots only on 64-bit machines.

Icon phone.png Candy (dascandy@gmail.com)
Icon site.png http://sourceforge.net/projects/atlantisos/
Icon time3.png July 16, 2009 -- 0.0.3 Rock
Icon magnify warning.png The validity of this entry is questionable;
No updates since July 2009 on sourceforge, possibly abandoned?

B

BareMetal

BareMetal is a 64-bit OS for x86-64 based computers. The OS is written entirely in Assembly while applications can be written in Assembly or C/C++. The two main purposes of BareMetal are for educational uses in learning low-level OS programming in 64-bit Assembly and to be used as a base for a high-speed data processing node. Source code is well documented and freely available. As of version 0.4.9 BareMetal OS officially supports multiple processors, memory management, and Ethernet communications.

Icon phone.png Ian Seyler (ian.seyler AT returninfinity.com)
Icon site.png http://www.returninfinity.com/baremetal.html
Icon time3.png active, 0.6.0 - released April 30, 2013.

BCOS

BCOS is a practical distributed operating system, initially aimed at 80x86/PC compatible computers. In general BCOS is meant to (eventually) make a group of computers connected by a network (a cluster of computers) behave like a single computer with multiple users.

Icon phone.png Brendan Trotter (btrotter AT gmail.com)
Icon site.png http://bcos.hopto.org/
Icon time3.png active

C

CakeOS

CakeOS (Cake) is a 32 bit operating system for x86 designed to be easy to use, with an interface that is both unique and yet instinctive. It is currently under development, with support for tasking, a dynamic heap, a 32bpp vesa/vga driver with mouse support, a basic shell and window manager, and several drivers in development. Cake has many ambitious aims for desktop usage.

Icon phone.png Luke Mitchell(lukem_95 [at] hotmail [dot] com)
Icon site.png http://code.google.com/p/cakeos
Icon time3.png unactive
Icon magnify warning.png The validity of this entry is questionable;
Not updated since 2009, unmaintained

Capital OS

Capital is an Object Oriented Operating System being developed for iPAX386+ processors. It features a multithreading tasking model. The kernel itself is multithreaded and is fully preemptible giving support for Real Time processes. The memory model is a paged virtual memory system. A hardware interface layer is envisaged. It follows a totally Object oriented design with all designing done in UML. It is being written in C++, C and of course, Assembly.

Icon phone.png Nippun Goel(athnippun AT yahoo.co.in)
Icon site.png http://www.capitalos.4t.com
Icon time3.png unactive, no releases
Icon magnify warning.png The validity of this entry is questionable;
No releases, it's just site with few pages of text about their "operating system"?

CapROS (The Capability-based Reliable Operating System)

CapROS is a new operating system that merges some very old ideas about capabilities with some newer ideas about performance and resource management. The result is a small, secure, real-time operating system that provides orthogonal persistence.

Icon phone.png No Contact Information
Icon site.png http://www.capros.org/
Icon time3.png no source code manipulation since 2005 (just some patch in 2010), but SourceForge page has last update in 2013
Icon magnify warning.png The validity of this entry is questionable;
Not developed since 2005

Caracal

Caracal started life as a hobby OS which was going to make it as far as a 'hello world' kernel. Since I got the OS Dev bug it has now grown to a multiboot compatible Protected/Long mode and ARM compatible OS with multitasking support. The ARM port is in its early infancy and is designed to test portability and to run on the Raspberry Pi. Since Caracal has started using GRUB2, CBoot, the bootloader has been abandoned. As with a lot of these hobby OSes, I have a lot less time to spend on Caracal than I would like!

Icon phone.png No Contact Information
Icon site.png http://www.ajsoft.co.uk/
Icon time3.png July 3, 2013 -- Caracal Kernel is early alpha. CBoot has been abandoned in favour of using GRUB2.

Cédille

Cédille is a microkernel that attempts to be just that - a kernel with barely anything in it so it doesn't screw up. It boots via Grub and is inspired by Mach and Linux.

Icon phone.png No Contact Information
Icon site.png https://github.com/Lionel07/Cedille
Icon time3.png July 3, 2014 -- 0.0.0.6

ChaiOS

Modular multi-platform OS. Even Kernel C library dynamically linked (using very basic duplicates)

Icon phone.png solocle (chaios.project@gmail.com)
Icon site.png https://github.com/solocle/ChaiOS
Icon time3.png active development

Cleese

The goal is an operating system written as much as possible in Python with the Python VM as a micro-kernel on top of a minimal C/asm layer.

Icon phone.png James Tauber(jtauber AT jtauber.com)
Icon site.png http://sourceforge.net/projects/cleese/
Icon time3.png last update on April 15, 2013, but still no releases

Clicker

Exploring new ways in OS design. Clicker32 is a microkernel-based system for x86 hardware. It's based on modular architecture and already supports preemptive multithreading + user-level processes. Next milestone (0.8.0) should allow loading of user program from another user program.

Icon phone.png Pype & the Clicker Development Team(pype_1999.geo AT yahoo.com)
Icon site.png http://clicker.sourceforge.net
Icon time3.png last update on April 15, 2013 - with releases
Icon magnify warning.png The validity of this entry is questionable;
Source code isn't modified since 2006, possibly unmaintained

Cloudium OS

This is being written in pure ASM with cloud computing in mind. Exploring the new exokernel designs and basin design decisions only on speed and cloud.

Icon phone.png 0xjarno (at) gmail.com
Icon site.png http://cloudium-os.sourceforge.net
Icon time3.png last update on May 24, 2014, last releases and development also in 2014

COBOS

COBOS is a, currently closed source, 64-bit microkernel based operating system. It is mainly developed for educational purposes.

Icon phone.png os64dev (retainsoft AT gmail.com)
Icon site.png http://sourceforge.net/projects/cobosproject/
Icon time3.png version 2.2.0, last update on April 25, 2013

Coremark

A minimalist kernel providing test environment for hardware performance analysis & testing

Icon phone.png Hüseyin Uslu(shalafiraistlin @NOSPAM@ gmail dot com)
Icon site.png http://coremark.sf.net
Icon time3.png 0, No public release yet -- No public release yet
Icon magnify warning.png The validity of this entry is questionable;
Page unaccessible, no foundable information on Google

cos2000

Un OS en fran?ais enti?rment en ASM. Le site traite aussi de la prog des OS.

Icon phone.png cos2000(horde AT flsh.unilim.fr)
Icon site.png http://www.multimania.com/cos2000
Icon time3.png
Icon magnify warning.png The validity of this entry is questionable;
Page doesn't exist, no foundable information on Google

Cosmos

C# Open Source Managed Operating System

Icon phone.png http://www.codeplex.com/Cosmos/People/ProjectPeople.aspx
Icon site.png http://www.codeplex.com/Cosmos
Icon time3.png -- Milestone 5, project still active

Coyotos

Coyotos is a multiprocessor successor to EROS that corrects a number of things that were learned from the EROS effort, among them that kernels really shouldn't be written in C++ for overhead and complexity reasons.

Coyotos is a secure, real-time, capability-based system that runs on embedded IA32 and Coldfire systems, and was deployed in commercial embedded applications. Work on Coyotos halted in 2009, but the website and source code continue to be maintained. The Coyotos source code may be of interest for the fact that it is well documented and exploits ELF linking capabilities for a number of unusual static initialization techniques. For those building non-UNIX systems, it may also be worth looking at the system image construction tool, sysgen. A successor to Coyotos is currently on the drawing board.

Icon phone.png Jonathan S. Shapiro (shap A.T coyotos D.O.T org)
Icon site.png http://www.coyotos.org
Icon time3.png Inactive since 2009


Crocos

Crocos is a small opensource UNIX-like kernel for x86/x86_64 systems (written in C), designed with simplicity in mind, for educational purposes. It is developed in several steps to allow people to understand how a tiny operating system can be built from scratch. The main idea used in early development phases is to run a multiprocesses environment inside one Linux process. This way, it is possible to implement a maximum of features with the comfort of Linux for debugging and tests.

Icon phone.png Guillaume Duranceau (g_duranceau A.T users D.O.T sourceforge D.O.T net)
Icon site.png http://crocos.sourceforge.net/
Icon time3.png Crocos is currently a multitasks system embedded inside one Linux process. It supports read operations on an ext2 file system.
Icon magnify warning.png The validity of this entry is questionable;
No development progress since 2009

D

d264b

A rewrite of Dreckig OS in 64-bit assembly language. Uses the same principles and technology from Dreckig OS including the megalithic kernel architecture. Currently in early stages of development.

Icon phone.png No Contact Information
Icon site.png https://github.com/WizardOfHaas/d264b
Icon time3.png Alpha - Active Development, last action in July, 2014

Derrick Operating System

A monolithic 32-bit operating system kernel designed for stability and speed. Derrick is running in protected mode. It's coded in x86 assembly and it's aimed as a single-tasking hybrid monolithic OS.

Icon phone.png Inflater (curko AT centrum.sk)
Icon site.png http://derrick.xf.cz
Icon time3.png -- See http://derrick.xf.cz unactive
Icon magnify warning.png The validity of this entry is questionable;
Not updated since 2008, unmaintained

DESKWORK

A DOS-based operating system for x86 computers, including a wide variety of applications and ethernet/internet access.

Icon phone.png Konstantin Koll ( see http://www.deskwork.de/KONTAKT.HTM )]
Icon site.png http://www.deskwork.de/
Icon time3.png -- See http://www.deskwork.de/DOWNLOAD/DW.HTM or http://www.deskwork.de/DOWNLOAD/LIVECD.HTM for most recent versions In active development, currently working on network firewall, HTTP server, video codecs, USB, FireWire

DEX Extensible operating system (dex-os)

dex-os is an educational operating system that supports a plug-in like architecture and aims to achieve zero static inter-module calls.

Icon phone.png Joseph Emmanuel Dayo(j_dayo AT yahoo.com)
Icon site.png http://sourceforge.net/projects/dex-os/
Icon time3.png April 15, 2007 -- kernel-dex_os-1.1
Icon magnify warning.png The validity of this entry is questionable;
No development progress since 2007, abandoned

DexOS

DexOS is a 32bit, asm OS, based on the idea, that it would be cool to have a OS based on a console type OS, but instead of running on a xbox or DS, it would run on a x86. From the start, as you would expect from a OS based on a game's console OS, optimizing for speed has been of paramount important in the over all design. To this end there's no virtual memory, paging, and only a single process is allowed (though that process can spawn multiple threads). The program runs in ring0, you have direct access to all hardware (including CPU and graphics). Memory allocation is the responsibility of the app--there's no front-end memory allocation. The entire OS will fit into less than 100k.

Icon phone.png Team Dex4u ( justdex4u@aol.com)
Icon site.png http://www.dex-os.com/
Icon time3.png active

Drako

Drako is a new operating system that start from scratch. It is based on 'abstract processor' concept that Drako will map on the real machine, at the moment the mapping is on x86 architecture.

Icon phone.png No Contact Information
Icon site.png http://www.Drako.altervista.org/
Icon time3.png active, last update in April 2013

DreamOs

Home-made operating system, developed in C and asm for x86 architectures.

Icon phone.png No Contact Information
Icon site.png http://www.dreamos.org/
Icon time3.png Active (last update on github is Nov 2013)

DreckigOS

Dreckig OS is an x86, real mode, multi-tasking(kinda) operating system written in assembly language. It uses a megalithic kernel, an experimental kernel architecture. Dreckig also has a GUI and a custom RAM disk file system. I am also developing a programming language for use with Dreckig OS.

Icon phone.png No Contact Information
Icon site.png http://www.code.google.com/p/dreckig-os/
Icon time3.png started in January 2013, no real progress since March 2013

Dux

Dux (started in 2008) is a constantly changing Operating System currently running on i386, using the metodo kernel. It is designed to be clean and easy to work with (for developers and users alike), and easy to debug with it's interactive kernel debugger ("colpa"). Access will be divided amongst 4 levels - Kernel Access (full access), Kernel Drivers (ie, graphics drivers), User Drivers (userland, but more syscalls), User Access (untrusted).

Icon phone.png Nick Markwell (nick AT duckinator.net)
Icon site.png http://github.com/duckinator/dux
Icon time3.png inactive since 2012

Dynacube Operating System

A Full fledged open source, x86 based, 32bit Protected mode, multitasking operating system. Check it out.

Icon phone.png Gandalf(mdshah82 AT yahoo.com)
Icon site.png http://www.dynacube.net/
Icon time3.png Abandoned, unmaintained since 2006
Icon magnify warning.png The validity of this entry is questionable;
No development progress since 2006

E

EmbOS (Embedded Operating System)

EmbOS aims to provide a basic operating system (task manager, basic drivers, memory management and file system support to allow quick easy development of embedded systems in a high level language by allowing the developer to focus on the software portion of the system.

Icon phone.png John (havok1984 AT gmail DOT com)
Icon site.png http://embos.wikispot.org
Icon time3.png no releases
Icon magnify warning.png The validity of this entry is questionable;
No development progress since 2011

EROS (Extremely Reliable Operating System)

EROS merges some very old ideas in operating systems with some newer ideas about performance and resource management. The result is a small, secure, real-time operating system that provides orthogonal persistence. - The CapROS operating system is a fork of EROS. EROS has since been superseded by Coyotos.

Icon phone.png Jonathan S. Shapiro (shap A.T eros DASH os D.O.T org)
Icon site.png http://www.eros-os.org
Icon time3.png Inactive since 2003

Escape

Escape is a 32-Bit microkernel operating system for X86 that supports multitasking and multithreading. It's implemented in ANSI C, C++ and a bit assembler and most parts of it are UNIX-like. The goal is to experiment with it and learn as much as possible about operating systems, hardware and so on.

Icon phone.png Nils Asmussen (nils AT script-solution DOT de)
Icon site.png http://script-solution.de/escape
Icon time3.png Lastest version is 0.4 released in 2011
Icon magnify warning.png The validity of this entry is questionable;
No development progress since 2011, previous versions were released every year

EX

EX (previously known as KOS) is a x86 architecture 32-bit protected mode computer operating system. It is developed since 2004 (with pauses in development) as a hobby. The website is run on a home PC, so expect it to be down for some time each day.

Icon phone.png irc://irc.data.lt/#osdev, or just see http://osdev.mine.nu/ex/?p=contacts)
Icon site.png http://osdev.mine.nu/ex/
Icon time3.png no development
Icon magnify warning.png The validity of this entry is questionable;
Page doesn't exists

F

FireOS

A 16-bit DOS-like operating system.

Icon phone.png Hakon Magnus (hakonmagnus45@gmail.com)
Icon site.png http://fireos.net84.net
Icon time3.png Version 3 Released (2014)

FlachsOS

FlachsOS is a 32-Bit Realtime Operating System.

Icon phone.png Daniel Wei?ler (Xardas) and Michael Wangler (Wacky)(michael.wangler AT web.de)
Icon site.png http://www.flachsos.de.vu
Icon time3.png inactive
Icon magnify warning.png The validity of this entry is questionable;
No development progress since 2004

Flick

Flick is supposed to be a simple but powerful and clean 32-bit Unix.

Icon phone.png Alexander Blessing(Alexander Blessing AT epost.de)
Icon site.png http://flick.sourceforge.net
Icon time3.png stopped
Icon magnify warning.png The validity of this entry is questionable;
Stopped in 2003

Fling OS

Fling OS is a reference operating system with full technical documentation and aiming to have full reference and tutorial articles on every aspect of the code.

Icon phone.png Edward Nutting (edman196 AT gmail.com)
Icon site.png http://www.flingos.co.uk
Icon time3.png August 24, 2014 -- 2nd release. Stable core kernel including USB 2.0 drivers. Active, Looking for developers, 2 versions released, Kickstarter project ongoing

Fluidium

Fluidium is a x86 hobby operating system designed to create a user-friendly, text-oriented, computer experience.

Icon phone.png Stephen D. (istvan14 AT gmail.com)
Icon site.png http://code.google.com/p/fluidium/
Icon time3.png July 05, 2008 -- Third stable development release.
Icon magnify warning.png The validity of this entry is questionable;
No development progress since 2009, abandoned

FreeDOS

Today, FreeDOS is ideal for anyone who wants to bundle a version of DOS without having to pay a royalty for use of DOS. FreeDOS will also work on old hardware, in DOS , and in embedded systems. FreeDOS is also an invaluable resource for people who would like to develop their own operating system. While there are many free operating systems out there, no other free DOS-compatible operating system exists.

Icon phone.png Jim Hall()
Icon site.png http://www.freedos.org
Icon time3.png active

FreeNOS

FreeNOS (Free Niek's Operating System) is an experimental microkernel operating system for learning purposes, licensed under the GPLv3.

Icon phone.png Niek Linnenbank(nieklinnenbank AT gmail DOT com)
Icon site.png http://www.FreeNOS.org
Icon time3.png inactive
Icon magnify warning.png The validity of this entry is questionable;
No real development progress since 2010

FritzOS

FritzOS is a (incomplete) OS. Ideas will be added to the OS as it's developed and, it will run on the x86 platform. FritzOS will have a GUI and be easy to use & understand.FritzOS is programmed in Assembly/Intel Syntax, C, and C++.

Icon phone.png Tom Fritz(jrfritz47 AT hotmail.com)
Icon site.png http://fritzos.sourceforge.net
Icon time3.png November 24, 2002 -- kernel-prekernel-0.7.1(C++) (CVS empty)
Icon magnify warning.png The validity of this entry is questionable;
Forgot in 2002, no progress

FROST

FROST is an OS written in FreeBASIC based on the FROST-Microkernel.

Icon phone.png see website
Icon site.png https://github.com/thrimbor/frost
Icon time3.png Basic kernel functionality available, IPC, VFS and SMP in development

FrostOS

FrostOS is an operating system developed by SecurityOverride. The OS aims to deliver a security auditing experience like none other.

Icon phone.png Alex <http://www.securityoverride.com (send a PM to bluechill or post in FrostOS section on forum)>
Icon site.png http://frostos.googlecode.com
Icon time3.png inactive
Icon magnify warning.png The validity of this entry is questionable;
No development progress since 2010

Fudge

Fudge started as a project to see if it would be possible to create an operating system that came as close as possible to be fully deterministic by not implementing solutions with unpredictable behaviour like dynamic memory allocation, scheduling and caching.

Icon phone.png Jens Nyberg (jens.nyberg AT gmail.com)
Icon site.png http://github.com/Jezze/fudge/
Icon time3.png Active (2013)

FunghOS

free, open-source, light-weight OS in active development

Icon phone.png No Contact Information
Icon site.png http://funghos.googlecode.com
Icon time3.png stopped
Icon magnify warning.png The validity of this entry is questionable;
No development progress since 2008, abandoned

G

GalaXyOS

This is a new OS written in C. We want that this OS is simple to use but highly sure and stable. One has already many as an example utility writer of simple text. It recognizes the frequency of the CPU and the amount of RAM.

Icon phone.png Massimo Angiolani(massimoangiolani AT libero.it)
Icon site.png http://www.galaxyos.cjb.net
Icon time3.png

Game6

This kernel is still in the planning stages, but it will be a microkernel. It is written to experiment with microkernels as well as to use as simple code as possible, getting the system working before caring about speed. Game6 is a codename (the OS is general purpose).

Icon phone.png Hangin10 on the OSDev.org forums
Icon site.png http://wiki.osdev.org/User:Hangin10/OS_Kernel
Icon time3.png

GeekOS

Earlier versions of GeekOS have been used as the basis for student projects in operating system courses. This new development version of GeekOS is a rewrite designed to address limitations in the original version. It is not specifically designed for course projects, but because it strives for simplicity, it might be useful for people interested in learning about OS kernel implementation.

Icon phone.png No Contact Information
Icon site.png http://code.google.com/p/geekos/
Icon time3.png Builds on x86. Runs under Bochs and Qemu.

Gemini

The goal is to create a production quality micro kernel based on the latest findings in operating system research. The result will be a micro-kernel having the following features: no abstractions, safe those necessary for protection, minimal set of primitives, support for capability based security, support for resource management needed for real-time and multimedia applications.

Icon phone.png No Contact Information
Icon site.png http://gemini.sourceforge.net/
Icon time3.png

Genius HorizonOS

This OS is made by a schoolboy (he was born in 1996) and is a small 32-bit, closed source OS but you still can ask the developer about how did he do that to help you to do the thing that you asking about. It supports FAT12, floppy disks, memory management, keyboard, and it will support graphics soon.

Icon phone.png Mohamed Elghamry (mohamed_salah1996 [at] yahoo [dot] com)
Icon site.png http://mohamedsalah96.web.officelive.com/GHOS.aspx
Icon time3.png in alpha stage

Groovyos

An open source OS in nasm and tasm

Icon phone.png Chris(groovywomble AT lycos.com)
Icon site.png http://www.rustyspigot.com/groovyweb/?page_name=groovyos
Icon time3.png

GZistem

A simple 32bits operating system being developed in C

Icon phone.png gzaloprgm (gonzaloavilaalterach AT gmail.com)
Icon site.png http://gzaloprgm.com.ar
Icon time3.png

H

Haiku

Fully featured open source operating system inspired by the commercial Be Operating System. Has a preemptive, modular kernel, reasonable POSIX compatibility, a nice (non-X11-based) GUI, and a wide variety of ported and native applications (including a WebKit based browser).

Icon phone.png haiku-development@freelists.org
Icon site.png http://www.haiku-os.org/
Icon time3.png September 13, 2009 -- R1 alpha 1 active

HelenOS

Preemptive microkernel multiserver design, SMP support, lightweight IPC, thread-local storage and user-space managed fibrils

Icon phone.png helenos-devel@lists.modry.cz
Icon site.png http://www.helenos.org/
Icon time3.png August 9, 2012 -- 0.5.0 active

HeliX

HeliX is a german open-source OS. It has a nice shell and already supports FAT 12, multitasking, keyboards and mice and very, very much more... HeliX is still in development and it doesnt exist a long time , so there are many features to come! At this point of time there are no downloads at the webpage, because there are still some heavy bugs (; -please be patient; they'll come!

Icon phone.png Illusoft(Ufo AT sandrakoenig.de)
Icon site.png http://www.helixos.de.vu
Icon time3.png

Horizon

Horizon is a research Operating System. It is written for the i386 processor family, using C (gcc) and some Assembly (nasm). Its main goal is to develop a natively network-integrated structure, so that I/O operations (both local and network ones) happen in the same manner. This way every Horizon node on the Internet (or in a LAN) can communicate natively by means of a Network File System.

Icon phone.png Francesco Frigo(frigofra AT tin.it)
Icon site.png http://horizon.sourceforge.net/
Icon time3.png

I

IanOS

IanOS is a small OS written for the x86_64 processors. The main goal of this OS is to be a system that is simple enough for beginners to understand yet sufficiently complex to demonstrate principles of OS design. It is not intended, at this stage anyway, to be a production OS. IanOS is written in assembly language and C. Full source code, documentation, and build instructions are available. There is a blog where design principles and changes are discussed.

Icon phone.png Ian Jack(ian AT ijack.org.uk)
Icon site.png http://www.ijack.org.uk
Icon time3.png March 31, 2012

IBOX

IBOX is a "modular" operating system for the x86 desktop. The main goals of this os are: Portability, Stability, Security, and Customizable. It will be written in assembly language and C. I suggest you take a look for yourself.

Icon phone.png William McCabe(firstjourney_os AT yahoo.com)
Icon site.png http://sourceforge.net/projects/ibox
Icon time3.png

Idylla OS

Idylla OS is small and simple operating system. It will be written in assembly language and C. The main goals: Portability, Stability, Security and Customizable.

Icon phone.png milyges (milyges AT gmail.com)
Icon site.png http://www.idyllaos.org
Icon time3.png July 26, 2008 -- 0.1-alpha

Infinitech

New project under way. The system is being written in C++.

Icon phone.png histevenk (dkordell AT msn DOT com)
Icon site.png http://www.infinitech.st-3.com
Icon time3.png

ISOS

ISOS is a very simple multithreaded OS for the Evaluator-7T board from ARM. It is based on JayOS also listed on this page. It features pre-emptive multi-threading, communication between threads, etc. and hardware drivers.

Icon phone.png Wilhem Meignan(w.m AT wanadoo.fr)
Icon site.png http://wilhem.meignan.free.fr/
Icon time3.png

IX

Operating System IX is an x86 64-bit research kernel project that aims to design a kernel for general purpose operating systems (including desktops and servers).

Icon phone.png Stephanos Io (root AT stephanos.io)
Icon site.png http://stephanos.io/
Icon time3.png

J

JaysOS

JaysOS is a "toy OS" that runs on the Gameboy Advance. It provides preemptive threads, semaphores, condition variables, and message queues.

Icon phone.png Justin Armstrong(ja at badpint.org)
Icon site.png http://badpint.org/jaysos/
Icon time3.png

Jimix

Jimix is an x86(_64) OS based on a microkernel architecture. It is written in C++ and all IPC methods are wrapped over a Remote Method Invocation paradigm.

Icon phone.png James Molloy (james__AT__jamesmolloy_co__uk)
Icon site.png http://jimix.googlecode.com/
Icon time3.png n/a, n/a -- n/a

Jinix

Jinix is a closed source operating system built from scratch.

Icon phone.png Jos Kuijpers aka (jos_kuijpers_ AT hotmail.com)
Icon site.png http://www.jinix-os.com
Icon time3.png

JNode

JNode (Java New Operating System Design Effort) is an open source java OS written fully in java (with a very small assembler nano-kernel).

Icon phone.png Martin Husted Hartvig (hagar AT jnode.org)
Icon site.png http://www.jnode.org
Icon time3.png

JonOS

JonOS is a 16-bit operating system made entirely in asm, released under the GNU General Public License. It can't do much yet, but it has a cool prompt and a nice clock ;)

Icon phone.png Wojciech Komorowski aka GigaWolf(gigawolf AT hotmail.com)
Icon site.png http://sail.to/jonos
Icon time3.png

JouleOS

Something simple and different; kind of like pie except with 32bits --This is basically a dead project.

Icon phone.png Earlz (earlz AT earlz DOT biz DOT tm)
Icon site.png http://earlz.biz.tm/old_site/desc.php
Icon time3.png October 14, 2006 -- JouleOS Version 0.0.8 Alpha

JPasKernel

An operating system written in Object Pascal targetting embedded platforms

Icon phone.png jeppe@j-software.dk
Icon site.png http://j-software.dk
Icon time3.png

JS-OS

JS-OS is a 32-bit operating system, written mostly in C, that is aiming to become a UNIX-like clone, but with some added/better capabilities. This project was started in late 2012 by a high school student and is meant to be a learning/research tool for both the developer and the user. The code is mostly commented and not too difficult to follow.

Using this operating system is meant to be easy and very intuitive. It is currently under development and supports preemptive multitasking, interrupts, an ext-2 clone file system (supporting up to 16GB files), a bunch of file system utilities, a basic shell, a dynamic heap, memory protection, a 32bpp VESA VBE and a VGA driver, a window manager, keyboard and mouse driver, and a sound driver.

Icon phone.png John Smith (jsmithcontact@tormail.org)
Icon site.png https://github.com/JSmith-BitFlipper/JS-OS
Icon time3.png April 20, 2013 -- JS-OS Version 0.0.1 stable; actively being developed

K

Kairos

Kairos is a revolution in operating system design: the focus is simplicity, minimalism, and power; doing away with 'legacy compatibility' and restoring optimal timing and throughput efficiency by utilising the full potential of the 64 bit architecture coupled with the modularity and reliability of a modern μKernel.

Icon phone.png Joshua K(stable.entropy AT gmail.com)
Icon site.png http://kairos.sf.net
Icon time3.png Planning Stage

Kid Operating System (KOS)

A French operating system project. A modular OS, written in C, with an object oriented driver management. Use protected mode. Lots of documentation on the Web site.

Icon phone.png Julien Munier, Thomas Petazzoni, David Decotigny(thomas.petazzoni AT enix.org)
Icon site.png http://kos.enix.org
Icon time3.png

Kiddie OS

Research operating system of mobile autonomous robots. It is suggested the system will act as the common intelligence for different types of machines including autonomous and humanoid robots able to collaborate with each other. It utilizes an idea and concept of self-learning adaptive operating system.

Icon phone.png Artur Emagulov (artur.a.e AT gmail.com)
Icon site.png http://code.google.com/p/kiddie/
Icon time3.png Started in C, later rewritten in C++. Has bootable microkernel, isr's, vm, simple scheduler, driver interface, stub drivers, pci enumerator, tiny jvm and experimental pure java drivers. Supports both x86-32 and ARM architectures. There are plans to add multicore support and native gpgpu computing support to run parts of OS on it.

KnightOS

Open-source operating system for Texas Instruments calculators. Features preemptive multitasking, memory management, etc, for 9 different calculators. Written in z80 assembly.

Icon phone.png Drew DeVault (sir AT cmpwn.com)
Icon site.png http://knightos.org
Icon time3.png Kernel is nearly mature, missing full support for writing files. Userland is very minimal and needs work. Contributors welcome.

Kolibri OS

Kolibri OS was a fork of the 32-bit version of Menuet OS but has changed much along the way. The Kernel and most applications, libraries and drivers are written in FASM.

Icon phone.png The Kolibri OS team ()
Icon site.png http://www.kolibrios.org
Icon time3.png December 13, 2009 -- 0.7.7.0

KOS

KOS is a modest OS meant to incorporate purely experimental features.

Icon phone.png Karthik Kumar (karthikkumar AT gmail DOT com)
Icon site.png http://guilt.bafsoft.net/downloads/wip/KOS
Icon time3.png Kernel has working interrupt handlers. Ongoing is the design process for the Re-entrant memory allocator, Kernel Re-entrancy and Subsystem Re-entrancy.

Kosar OS

Sample x86 OS with farsi support. Non-english homepage.

Icon phone.png No Contact Information
Icon site.png http://kosaros.blog.ir/
Icon time3.png 0.1.0

Kryos

Kryos is an open source hobby/developer Operating System. Kryos has a basic command line interface (cli), multitasking, drivers, debugging and basic executable loading, not to mention a lot of other features

Icon phone.png Michael Lazear(onyxkernel AT gmail.com)
Icon site.png http://onyxkernel.googlecode.com
Icon time3.png

L

L4ka

L4 is an extremely fast microkernel available for x86, ARM, MIPS and other architectures.

Icon phone.png University of Karlsruhe, Germany(l4ka AT ira.uka.de)
Icon site.png http://l4ka.org/
Icon time3.png

Lemadops OS

Lemadops is my atempt at writing an OS. It's not very advanced but it will be free to download if anyone wants it. I am aiming for a DOS like system.

Icon phone.png Jonathan (Sparkles)(lemadops AT hotmail.com)
Icon site.png http://lemadops.tripod.com/
Icon time3.png

Leviathan

Leviathan is a micro/modular 64 bit kernel that aims to be used by the general public. It includes support for my rwfs filesystem which can handle 500 million exabytes of storage.

Icon phone.png Kristian Hart, nekros729@gmail.com
Icon site.png http://leviathanv.googlecode.com
Icon time3.png Design Stage

Lily

Lily is a microkernel based on the I/O automata formal model designed to support the development of reactive programs. Device drivers and programs are expressed as automata that can be composed at run-time. x86(32-bit)/C++/C.

Icon phone.png Justin Wilson jrwilson AT go.wustl.edu
Icon site.png http://github.com/jrwilson/Lily
Icon time3.png Active

Logram

Logram is a small operating system fully 64-bit. It uses its own file system (FSL), and recognizes the keyboard. It is developed since April 2008. Logram is maintained by a large community of enthusiasts. It is also a site where you can ask questions and talk about your own OS (as osdev.org). The site is in french.

Icon phone.png Denis Steckelmacher(steckdenis AT yahoo.fr)
Icon site.png http://www.logram-project.org
Icon time3.png v0.0.7.5 : File system, memory, extensions, syscalls, keyboard
Icon magnify warning.png The validity of this entry is questionable;
It seems that Logram is no longer an OS, but a Linux distribution.

LUnix

LNG is an operationg system primarly for the good old Commodore64 home-computer. There also is a native version for the successor Commodore 128. Ports to other 6502/6510 driven 8-Bit Computers are possible but not yet started. LUnix started in 1993 and reached the internet in 1994. In 1997 LUnix 0.1 was rewritten from scratch, the result is LNG.

Icon phone.png Daniel Dallman(Dallmann AT heilbronn.netsurf.de)
Icon site.png http://lng.sourceforge.net/
Icon time3.png

M

M3

M3 is an operating system targeting the IA32 architecture. It is currently under development. The goal for this project is to learn the ins and outs of OS development, and share this knowledge by writing tutorials and well-commented code.

Icon phone.png Peter de Tagyos (peter AT ptss.net)
Icon site.png http://m3os.wordpress.com
Icon time3.png

Mammoth OS

Mammoth OS is a compact, lightweight kernel designed to have a monolithic core, and a modular kernel extension system. We hope to have a full implementation of a C compiler toolchain, and other languages such as C++ and Assembly by Augest 2009.

Icon phone.png callum(at)rohedin.co.uk
Icon site.png http://launchpad.net/mammoth-os
Icon time3.png February 18, 2009 -- Version 0.0.2. Still very basic pre-alpha. Implemented proper I/O functions. Next release: Advanced Output, Memory Manager.

ManRiX

ManRiX OS is open source microkernel based operating system with POSIX compliance.ManRiX OS is written totally from scratch using C and Assembly language.

Icon phone.png Manish Regmi(regmi_manish AT gmail.com), Rajesh Bikram R.C. (rajesh.rc AT gmail.com)
Icon site.png http://manrix.sourceforge.net/
Icon time3.png

Mattise

Mattise is a very simple hobby operating system for x86 architectures. It is a monolithic kernel written completely in C and assembly with paging, ELF loading (modules and executables) and a working Newlib port. It has a rudimentary shell and a working nasm and binutils port.

Icon phone.png Matthew Iselin (pcmattman AT users.sourceforge.net)
Icon site.png http://mattise.sourceforge.net/
Icon time3.png April 1, 2007 -- basic C-only version of the kernel, without paging or newlib; basic binary file loader

MazzanetOS

MazzanetOS is a DOS/UNIX-like operating system written in assembly language and C++. It currently runs off a floppy disk and includes a graphics demo. It will run (hopefully) on any PC.

Icon phone.png mazzanet(mazzanet AT hotmail.com)
Icon site.png http://mazzanetos.sourceforge.net
Icon time3.png

Media OS

Media OS is a secure, microkernel paradigm, 64bit multiprocessor, preemptive multitasking, operating system designed with future technology in mind to take full advantage of hardware. At this point it is non functional, but a CVS exists for it if you would like to take part.

Icon phone.png iLewis (ilewis_isradd AT hotmail.com)
Icon site.png http://retsim.com/index.php/ri-projects/media-os
Icon time3.png Pre-Alpha (Bootloader and simple kernel are complete)

Melon

Melon is a C++ operating system designed to be simple and fast and to provide a coherent OO framework for developing applications.

Icon phone.png Alexis211 <alexis211 AT gmail.com>
Icon site.png http://github.com/Alexis211/Melon
Icon time3.png not really maintained anymore

MenuetOS

MenuetOS is a fully 32 bit assembly written graphical operating system. Menuet supports 32 bit x86 assembly programming as a faster and smaller system footprint. Menuet has no unix roots and the basic system is meant to be a clean asm based structure. Menuet isn't based in any particular operating system, since the idea has been to remove the extra layers between different parts of software, which complicate programming and create bugs. Menuet's application structure is not specifically reserved for asm programming since the header can be produced with practically any other language. However, the overall application programming design is intended for easy 32 bit asm programming. The GUI is extremely easy to handle with assembly language. http://MenuetOS.net/ .

Icon phone.png The MenuetOS development team()
Icon site.png http://www.menuetos.net/
Icon time3.png

Metta bootup.png

Mettā

Mettā aims to be your mithril compass, that is, a device powerful in determining what is worth and what is not worth doing, in determining when it is the right time for doing so and also on doing the things it can do, without taking up your time.

Icon phone.png Berkus (berkus AT exquance.com)
Icon site.png https://github.com/berkus/metta/wiki
Icon time3.png Active (2013-08-11)

Micro OS X

A Free DOS like Operating System which fits on one floppy disk. The new Micro OS X is the third generation of Micro OS. The Micro OS X Workspace Manager is based on GEM Desktop.

Icon phone.png Bj?rn Schnackenbeck(megadriveag AT yahoo.de)
Icon site.png http://www.mosx.de.vu/
Icon time3.png
Icon magnify warning.png The validity of this entry is questionable;
WARNING! This URL Website is not in English.

MicroBe OS

Hobby OS aimed to learn how things are done. Written in x86 assembler.

Icon phone.png Vladimír Šiman(online AT microbe dot cz)
Icon site.png http://www.microbe.cz/
Icon time3.png -- With huge time gaps developed since 1997 but so far no release available to public.

MIK

A hobbyist 32-bit x86 OS coded completely in pure assembly. Goals are a fully capable operating system with paging/multitasking/FDD, HDD and USB support.

Icon phone.png Pascal Smit(smitpascal AT gmail DOT com)
Icon site.png No URL
Icon time3.png -- Not Yet Releasd

MikeOS

A hobbyist 16-bit x86 OS with rudimentary DOS compatibility that boots from a single floppy disk.

Icon phone.png Mike Saunders(okachi AT gmail DOT com)
Icon site.png http://mikeos.berlios.de/
Icon time3.png

Mini Operating System

"a 21st Century Operating System"; "easy to use"; written in a Java dialect called Turk/2 designed to be more robust than standard Java; all program operations can be done with direct manipulation (WIMP); portable to all CPUs.

Icon phone.png '
Icon site.png http://www.ittybittycomputers.com/IttyBitty/OSblue.htm
Icon time3.png

Minirighi

A didactic Linux-like kernel.

Icon phone.png Andrea Righi(righiandr AT users.sourceforge.net)
Icon site.png http://minirighi.sf.net
Icon time3.png

Mojo OS

Mojo OS aims to be a modern desktop operating system. Ity is currently under active development but far from finished. Read much more on the homepage.

Icon phone.png Christian Lange (clange AT softwarewizard.dk)
Icon site.png http://www.softwarewizard.dk/mojo/
Icon time3.png November 19, 2009 Current version 0.2.2

Mona OS

Mona OS is a small, new and fast microkernel system written in C++ for Intel x86 architecture. It is neither a POSIX or Windows clone.

Icon phone.png Higepon (higepon AT users.sourceforge.jp)
Icon site.png http://www.monaos.org/
Icon time3.png

MOS

Mother Operating System – An operating system designed and developed in C/C++ to work on x86 (alike) processor. It is a 32 bit protected mode OS using x86 architectural features for memory management (paging, segmentation) and process management (TSS, Call Gates, Interrupt Gates). Aim is to build a minimal complete packaged OS with support for USB, Internet (wifi) and a cool GUI -> and make it suitable for tablet pcs/netbooks/mobiles.

Icon phone.png MosMan (srinivasa_prajwal@yahoo.co.in)
Icon site.png http://www.themosland.110mb.com/
Icon time3.png Version 2.0

MSB-OS

An OS originally designed as a platform for my own A.I. work (linguistics), but soon to be used for education purposes as well. All programming of MSB-OS has been done directly in machine code (without using assembler).

Icon phone.png osproject AT magicschoolbook DOT com
Icon site.png http://www.magicschoolbook.com/computing/os-project
Icon time3.png

MuOS

Little 32-bit OS with continous development and with good documentation.

Icon phone.png Gregor Brunmar(gregor.brunmar AT home.se)
Icon site.png http://hem.passagen.se/gregge/
Icon time3.png

MVS/380

IBM's old IBM mainframe operating system (MVS) was public domain. With a freely available IBM hardware emulator available, this operating system was dusted off and being given a new life with some radical architecture changes. There's a similar VM/380 available too, for another IBM mainframe OS.

Icon phone.png Paul Edwards (fight.subjugation@gmail.com)
Icon site.png http://mvs380.sourceforge.net
Icon time3.png Version 1.0 released and a group of people driving it forward on a daily basis instead of being a one-man project

MyNOS

The MyNOS project aims at developing a new and different operating system, based on high-level languages. MyNOS will be based on the OCaml bytecode interpreter. We'd like to explore microkernel architecture and new language definition too.

Icon phone.png Cesare Zavattari(cesare AT ctrl-z-bg.org)
Icon site.png http://mynos.sourceforge.net
Icon time3.png

MyOS

MyOS is a free operating system for x86 and mips, coded in C++ with elf, vesa, ata and ext2 supports.

Icon phone.png Samy Pesse (samypesse AT gmail.com)
Icon site.png https://github.com/SamyPesse/How-to-Make-a-Computer-Operating-System
Icon time3.png

MysteriOS

Extremely modular monolithic kernel (just like Linux but much more modular) designed to be potentially portable on almost any platform

Icon phone.png Pierre Krieger (webmaster AT tomaka17.com)
Icon site.png http://mysterios.tomaka17.com
Icon time3.png -- No release for PC, only for GameBoy Advance. Current build (05/2009) has a graphic GUI and can run small native Linux programs (ie. a binary working on Linux could work on MysteriOS without recompiling it)

MysticOS

MysticOS is an exokernel based OS. Its main goal is to be able to adapt to the users wishes and abilities at run time, providing the perfect environment for anybody. Current features include FreeBasic support and hardware accelerated graphics (2D and 3D).

Icon phone.png Marcel Sondaar(marcel_willem :at: hotmail.com)
Icon site.png http://www.d-rift.nl/combuster/mos3/
Icon time3.png 2013 -- The OS is currently pre-alpha - there are no official releases yet. However, nightly builds, source code and documentation are available.

MyXomycota

MyXomycota is a monolithic system running in protected mode and using paging. It is written in C, newlib (a small stdlibc) is partly ported. It runs from a floppy disk (loaded with BIOS interrupts on startup, hence even USB floppy disk drives are supported). I am sorry but many texts are German.

Icon phone.png Max Reitz (xanclic@googlemail.com)
Icon site.png http://sourceforge.net/projects/myxomycota
Icon time3.png April 4, 2009 -- Kernel with programs running in user mode (simple shell, brainfuck compiler, simple editor (cedit), standard programs (ls, cp, rm, cd, echo, file, top, mount) and some ported programs (aargh interpreter, flat assembler 1.67.26, ed)). 0.003 (pre alpha)

N

Naked Lady

An open source minimal base operating system, suitable for installation on an IBM compatible computer fitted with a IA32 compatible processor.

Icon phone.png Mark Hobley(markhobley@yahoo.deletethisbit.co.uk)
Icon site.png http://markhobley.yi.org/nakedlady/
Icon time3.png Bugs in the build toolchain are preventing system compilation

Nameless OS

a portable multi-user Unix-like OS. i386, amd64 and ARM. Fully protected. GUI without X. Modular kernel. Closed source.

Icon phone.png Piotr Durlej (http://www.durlej.net/contact)
Icon site.png http://www.durlej.net/nameless
Icon time3.png Alpha release to testers

Nano Os

Nano Os is a Hobby/Educational Operating System Project. It is a monolithic kernel OS for PC and compatibles with 386 and above. It is written in g++ and assembly(NASM)

Icon phone.png Ashok Shankar Das(ashok[dot]s[dot]das [at] gmail[dot]com)
Icon site.png http://code.google.com/p/nanoos/
Icon time3.png 2 and half years spare time development, Protected mode, Memory Manager, Shell, Basic multi Tasking

Nanos

Nanos is a protected mode nanokernel OS for x86 computers. It is written in assembly and assembled with NASM.

Icon phone.png Peter Hultqvist(email at peter.h endnode.se.)
Icon site.png http://lab.endnode.se/nanos/
Icon time3.png Bootable kernel, no futher work will be done.

NDK

NDK is neuraldk's ongoing experimentation at creating a new, modern operating system. Currently in its infancy, it's of little use to anyone but the beginning operating systems developer.

Icon phone.png (carbonBased@neuraldk.org)
Icon site.png http://www.neuraldk.org/product-NDK
Icon time3.png

Neptune Operating System

Neptune is a self hosting 32 bit highly modular graphical multitasking operating system written in C and some assembly.

Icon phone.png See website.
Icon site.png http://www.brokenthorn.com/mos
Icon time3.png

netbas os

a fun (closed source) os!

Icon phone.png See website.
Icon site.png http://easion.googlepages.com/index.html
Icon time3.png

NukeOS

NukeOS is a hobby OS, currently being written in C and Assembly

Icon phone.png charlie@ricchio.com
Icon site.png [None yet =3 None yet =3]
Icon time3.png Not even past the bootloader stage =D

O

Oberon System

The Oberon System is an academic operating system which was developed by Niklaus Wirth and Jürg Gutknecht in the second half of the 1980s. It is available from ETH Zürich and a more current multiprocessor version can be found here: BlueBottle (see also A2). Note that some stuff on these pages appear outdated, but this may be more a problem of keeping the Web-pages as current as the System. An active mailing list is here: Oberon Mailing List Archive. More current and in depth documentation is included in the systems, although you (sorrily) have to master their (partially) unconventional user-interface before you can access the documentation. Many dead links in Native Oberon reference site can be reanimated by replacing www with www-old.

Icon phone.png No Contact Information
Icon site.png http://www-old.oberon.ethz.ch/native
Icon time3.png 2.3.6 hibernating/orphaned (last changes in the alpha of 2005, some more stuff in SourceForge)

ominOS

ominOS is a small lightweight kernel that aims to be simple to and have easy to understand source code to learn from. Its definitely not doing anything revolutionary, but I love working on it and seeing where it goes. Currently the os has ports of Nasm, binutils, and some graphic libraries. Also has a partially implemented TCP/IP stack.

Icon phone.png Anthony Lineberry (anthony.lineberry AT gmail DOT com)
Icon site.png http://ominos.sourceforge.net
Icon time3.png 0.0.1-alpha

Onem OS

Onem OS is an x86-16 assembly kernel. The goal is to be able to run it off of a usb thumb drive.

Icon phone.png No Contact Information
Icon site.png http://code.google.com/p/onem16/
Icon time3.png alpha

Orange OS

The Orange OS Project started with the intent to design a lightweight Operating System. It contains a small kernel designed for those interested in the low-level, practical aspects of building an x86 system. Currently, it is designed to fit on a floppy.

Icon phone.png Berlin Brown(bigbinc AT hotmail.com)
Icon site.png http://orangelin.sourceforge.net/
Icon time3.png

OS-periment (The)

This project aimed at cleaning up the mess that desktop OSs have become, going back to a simple, lean and evolutive state. It also tried to be an OS which is solely optimized for use on personal computers from the ground up, like BeOS was, and unlike OSs like the Windows NT family or most Unices which try to address many other, sometimes conflicting needs (like those of company servers). Finally, it aimed at improving the quality of the everyday desktop user experience through increased reliability, better consistency in the user interface, simpler interaction models, lower annoyance...

The first attempt didn't work, however. Perhaps development will start again in the future, but for now the project has been put in hibernation.

Icon phone.png Hadrien G.(knights_of_ni AT gmx.com)
Icon site.png http://theosperiment.wordpress.com
Icon time3.png Development stopped on 23/07/2013

OS/C

OS/C is my small, open-source, Unix-like OS. It is (and was) designed to preform networking tasks and other file-oriented processes whiltaking up very little of the computer's processing power.

Icon phone.png Collin(projectosc AT yahoo.com)
Icon site.png http://blake.prohosting.com/osc1/
Icon time3.png

Osiris

A modular OS written in C/Assembly. Grub used as the boot loader. Paging, Multi threading, basic vesa mode GUI. Dynamic ELF support, Small C Library(Safe String, Math, IO, Mem). Grub loads the Hal which in turn loads the Kernel and other OS Services. Currently working on a USB stack, MP support, NIC Drivers, reworking the GUI system.

Icon phone.png Sanchan M(lonesamurai5 AT gmail.com)
Icon site.png http://tecreat.com/
Icon time3.png

OSSO

A Micro Kernel Operating System written from scratch

Icon phone.png Alessandro Iurlano(iurlano at users.sourceforge.net)
Icon site.png http://osso.sourceforge.net
Icon time3.png

Oxygen Kernel

Graphical microkernel designed for portability and modern systems.

Icon phone.png Jessica Hawkwell (ladyserenakitty at gmail.com)
Icon site.png http://oxygen.ladyserenakitty.com/bin/
Icon time3.png

OZone

OZone is a suite of projects targeted at various platforms, all using the same XML based programming language. This is accomplished by enumerating any platform specific values or constants in an XML document, and using that document to generate the schema and transform documents needed to convert any references to those elements into their underlying value. The project includes platform definitions for Intel, AMD, IBM, Microsoft, .NET, Java, Nintendo, Raspberry Pi, Commodore, Atari and more.

Icon phone.png Joshua Bair (j_bair at bellsouth.net)
Icon site.png http://ozone.codeplex.com
Icon time3.png Alpha; Published to CodePlex on June 9, 2014

P

Particle OS

Particle OS is a 32-bit operating system. Visit the website for more information.

Icon phone.png The author: webmaster AT theflash.heliohost.org
Icon site.png http://theflash.heliohost.org/particle/
Icon time3.png -- Particle OS version 1.0 is complete.
Icon magnify warning.png The validity of this entry is questionable;
No web site (August 2013)

PDOS - Public Domain Operating System

One of very few operating systems that have an explicit "released to the public domain" notice. What that means is that if you spend time on this, and you later see a commercial use for it, there is absolutely no restriction on selling/modifying etc, any more than you would dig up Shakespeare and ask him if it's OK to use "Hamlet". It is designed to look like MSDOS, and can currently execute some MSDOS executables unchanged. It's written in C, with some assembler, and a 32-bit version, that also looks like MSDOS, but isn't, is included.

Icon phone.png Paul Edwards - main author: fight.subjugation@gmail.com
Icon site.png http://pdos.sourceforge.net
Icon time3.png -- PDOS 0.86 is sufficiently complete to allow some commercial tasks to be theoretically possible. Current activity is restricted to the C runtime library that it is operates with, rather than the OS itself.

Pebble Operating System

Pebble is a 32-bit operating sytem for IA-32 systems. It can run MS-DOS and DPMI compatible applications and will provide advanced features such as multitasking and paging. It will be a good platform to run old MS-DOS and embedded programs.

Icon phone.png Raghu Kaippully - kraghu@users.sourceforge.net
Icon site.png http://sourceforge.net/projects/pebble-os/
Icon time3.png

Pedigree

Monolithic OS with several backends supported - x86, x64, MIPS32, ARM and PowerPC. Kernel written in C++ with the obvious bits of ASM. Offers a reasonable amount of POSIX support and a tiling GUI and can run Apache, DOSBox, and various other common programs. Planned to also offer a native API alongside POSIX for Pedigree-specific applications.

Icon phone.png JamesM, bluecode, pcmattman, IRC freenode.net#pedigree
Icon site.png http://www.pedigree-project.org/
Icon time3.png Foster Milestone #1 (most recent release).

Perception

A 'managed' operating system environment built around a high level language called Shovel. The project was rebooted as of Q2 2014.

Icon phone.png MessiahAndrw.
Icon site.png https://github.com/MessiahAndrw/Perception
Icon time3.png

Plan 9

Plan 9 is a distributed system built by Bell Laboratories (now Alcatel-Lucent), the same group that developed Unix, C, and C++. ... it uses three kinds of components: terminals that sit on users' desks, file servers that store permanent data, and other servers that provide faster CPUs, user authentication, and network gateways. ... In typical use, users interact with applications that run either on their terminals or on CPU servers, and the applications get their data from the file servers. The CD image is built every night from the latest source and also work as a `live CD'. There is a Plan 9 Wiki.

Icon phone.png '
Icon site.png http://www.plan9.bell-labs.com/wiki/plan9/plan_9_wiki/
Icon time3.png

Plan 42

A small public-domain OS, based on the 'nanos' nanokernel.

Icon phone.png '
Icon site.png https://github.com/mooseman/plan_42/
Icon time3.png

Pocket OS

Pocket OS is an operating system in the spirit of DOS.

Icon phone.png '
Icon site.png http://pierrel5.free.fr/PocketOS/eindex.htm
Icon time3.png version 1.0

Polix32

Polix is a 32-bit operating system for x86, based on Linux kernel.

Icon phone.png michael (uzm386 AT gmail.com)
Icon site.png http://uzm386.awardspace.us/polix32.html
Icon time3.png version 0.0.1

POS

Peter Operating System is my os research project started in year two in university 1998.

Icon phone.png Peter (peter AT petersoft.com)
Icon site.png http://pos.petersoft.com/
Icon time3.png

POSYS

POSYS: Programmers Operating SYStem Small, fast, dynamic, secure. (In development) Language: NASM + CC386. Useful links on page.

Icon phone.png Chris Pop(popcristian AT users.sourceforge.net)
Icon site.png http://posysos.sourceforge.net/
Icon time3.png

Prex

The Prex project is an open source initiative to provide a portable real-time operating system for embedded systems.

Icon phone.png Kohsuke Ohtani(kohtani AT users.sourceforge.net)
Icon site.png http://prex.sourceforge.net/
Icon time3.png

Pro-OS

A 32-Bit OS for the x86. A microkernel architecture targetted for speed.

Icon phone.png I. Amalan Joe Steeve(joe_steeve AT phreaker.net)
Icon site.png http://sourceforge.net/projects/pro-os
Icon time3.png Last update in 2009

PuddingOS - PNL/OS

A small, fast and complete Operating System in 32 bits

Icon phone.png David Delassus <linkdd62@gmail.com>
Icon site.png http://github.com/LinkDD/puddingos/
Icon time3.png
Icon magnify warning.png The validity of this entry is questionable;
Web site seems to be: http://codingteam.net/project/puddingos

Pure64

Pure64 is a second stage bootloader for 64-bit PC's with compatible Intel or AMD processors. The loader gets the computer into a full 64-bit state with no legacy compatibility layers. Pure64 also enables and configures all available Cores/CPUs in the computer. An information table is stored in memory after Pure64 is finished that stores important details about the computer.

Icon phone.png Ian Seyler (iseyler AT returninfinity.com)
Icon site.png http://www.returninfinity.com/pure64.html
Icon time3.png -- v0.4 Active

Pépin

A small and simple kernel created for educational purposes. A great care is put on keeping the code as simple and clear as possible. The project home page provide a full tutorial (currently only in french) explaining how to code a kernel using a bottom-up approach. Pépin is written in C and some i386 assembly. Support : Grub, 32bit Protected mode, Interrupts, Segmentation, Paging, Syscalls, Multi-tasking, IDE PIO mode, Ext2FS (read), ELF, Signals. Every stuff released under GNU GPL and GNU FDL terms. [1]

Icon phone.png feedback form on website
Icon site.png http://a.michelizza.free.fr/pmwiki.php
Icon time3.png December 16, 2008

PrettyOS

A simple kernel created for educational purposes. A great care is put on keeping the code as readable as possible. PrettyOS is written in C and some i386 assembly (own bootloader). PrettyOS offers network, FAT12/16/32, uhci, ohci, ehci, xhci. [2]

Icon phone.png Dr. Erhard Henkes
Icon site.png http://prettyos.de
Icon time3.png 2013

Q

Quark Operating System

Quark is an Object Oriented 32 bit operating system. It aims to be a complete multitasking kernel.

Icon phone.png Ananth Shrinivas(compstud2001 AT yahoo.com)
Icon site.png http://sarovar.org/projects/quark
Icon time3.png

QUARN

OS project in assembler and C. System works in 32bit Protected Mode, with multitasking and multithreading. There is also ELF attendance and dynamic linker. Quarn OS has drivers for FDC, PIT, RTC, serial port, keyboard, VGA (text mode), PCI bus and many more. It also provides tool that allow to configure it, possibilities are very wide. For example you can chose if you want it to run with full preemption, user-space preemption or without preemption. Quarn OS also has special Artificial Intelligence module that is used in scheduler, but there are plans to use it in many more ways.

Icon phone.png Pawel "Hery Sasta" Dziepak (hryssta AT gmail.com)
Icon site.png http://quarnos.sourceforge.net/
Icon time3.png

R

RDOS

32-bit x86 based OS written mostly in assembly. Provides protection with segmentation and paging. Has drivers for FAT-based file systems, TCP/IP, USB, sound, LFB based VESA support with a GUI API. The user-level API is based on C++ classes. OpenWatcom is used for building both applications and device-drivers.

Icon phone.png Leif Ekblad(leif AT rdos.net)
Icon site.png http://www.rdos.net
Icon time3.png Stable, has some 400 commercial installations.

ReactOS

A GPL project to clone WinNT written from scratch. It runs: Firefox, OpenOffice 2,Quake III Arena, and much more. A lot of work is still need to be done. Looking for developers.

Icon phone.png a team of developers(ros-general AT reactos.com)
Icon site.png http://www.reactos.com
Icon time3.png 0.3.13 - Alpha Stage (Not recommended for everyday use)

Reaver Project OS - Rose

Open source project striving to provide a µkernel and a set of necessary services. Written in modern C++, currently targeting AMD64 SMP systems. Not POSIXish. Timer framework, IPI framework, thread switching are finished. There's also a basic, dumb scheduler without wait queues. Work progresses on enabling userspace and basic syscalls.

Icon phone.png Michał "Griwes" Dominiak(griwes AT griwes.info)
Icon site.png https://github.com/griwes/ReaverOS
Icon time3.png January 12, 2014 -- Cotyledon 0.0.4 dev

RedOS

RedOS is a small operating system written in C ,assembly it work on PM32, Just come to see.

Icon phone.png ELAATIFI Sidi Mohamed(elaatifi AT hotmail.com)
Icon site.png http://smelaatifi.free.fr/redos
Icon time3.png Front page only, last updated in 2002

Retro OS

Retro OS is a simple os, it has simple cooperative multitasking, x86 architecture, loads binary programs from the ramdisk (in kernel-mode), very simple (but functional) drivers, and a megalithic kernel

Icon phone.png far.peter1(at)gmail.com
Icon site.png https://github.com/farlepet/retro-os
Icon time3.png Pre-Alpha

Retro Rocket

Retro Rocket is a 32-bit protected mode operating system with the majority of the userland written in BBC BASIC, using a builtin interpreter. It is designed to imitate the BBC Micro's MOS (Machine Operating System) in appearance and behaviour, with modern concepts such as multitasking, memory protection and much more modern system specs.

Icon phone.png Brain
Icon site.png http://brainbox.cc/repository/trunk/sixty-four/
Icon time3.png Version 0.1, working shell, under alpha development.

RhinOS

RhinOS is a french 32bits x86 micro-kernel like OS. At the time of writing, it has its own bootloader, a physical memory manager (buddy system), a virtual memory manager for the kernel (slab allocator and buddy system), a minimal thread management and IPC via message passing.

Icon phone.png Gab (gb.viel AT gmail.com)
Icon site.png http://code.google.com/p/rhinos/
Icon time3.png Code Review for thread management and IPC

Rhombus

Rhombus is a microkernel-based operating system written in C for protected mode x86. It currently contains a kernel, drivers, shell utilities, and a C library, all written from scratch. It has a distributed VFS mechanism, a human-readable/writable remote procedure call protocol, and some other neat features. It is roughly UNIX-like, but with some major architectural differences. It is distributed under an OpenBSD-style license. It has been under pretty active development for the last three years, and is nearing a public alpha/beta release.

Icon phone.png Nick Johnson (nickbjohnson4224 AT gmail.com)
Icon site.png http://github.com/nickbjohnson4224/rhombus/tree/master
Icon time3.png Version 0.8 Alpha

RISC OS

Designed in Cambridge, England by Acorn. First released in 1987, its origins can be traced back to the original team that developed the ARM microprocessor. Niche community using emulation, legacy systems and newer ARM hardware such as the BeagleBoard. "Shared source" fork (Castle Technology Ltd's RO 5) available for free non-commercial use, proprietary fork (RISCOS Ltd's RO 4 & 6) closed source.

Icon phone.png RISC OS Open
Icon site.png http://riscosopen.org
Icon time3.png January 23, 2010 -- Iyonix ROM release (v. 5.16), Development release (v. 5.17) Stable, semi-defunct commercial use. Development currently focused on ARMv7 hardware.

RMMTOS

Real Mode Multitasking Operating System

Icon phone.png Mikko Paukkonen (mikko.paukkonen AT gmail.com), mikkop92 at the forum
Icon site.png http://code.google.com/p/rmmtos/
Icon time3.png

RMoX

A highly concurrent OS written (mostly) in the occam-pi parallel programming language. The OS is designed and built from large numbers of small concurrent processes that are cooperatively scheduled and communicate via synchronous channels. Currently only targets x86 based systems (586 and up) with embedded platforms (PC/104 and PC/104plus) in mind.

Icon phone.png Fred Barnes (F.R.M.Barnes AT kent.ac.uk)
Icon site.png http://rmox.net/
Icon time3.png experimental but functional

Ruby Operating System

Harvest the best features from other operating systems and combine it into ROS. ROS should be user friendly. As much as possible should be written in Ruby, so that a user, which masters Ruby, are in full control of ROS.

Icon phone.png Simon Strandgaard(neoneye AT adslhome.dk)
Icon site.png http://ros.rubyforge.org/
Icon time3.png Design phase

RYMOS

Graphic os under construction maked with NASM and GCC

Icon phone.png Roberto Rodriguez(prfiredragon AT gmail.com)
Icon site.png http://rymos.cf.gs/
Icon time3.png PreAlpha

S

Saerox

An OS meant to be extremely stable and use resources efficiently. It is currently in development and will run on Intel x86. Written in assembly and C. It is not commercial yet, so help is greatly appreciated.

Icon phone.png Jason Prince (jason.prince@saerox.com)
Icon site.png http://www.saerox.com/
Icon time3.png
Icon magnify warning.png The validity of this entry is questionable;
Website down

sanos

A small 32-bit x86 operating system kernel for jbox appliances. A jbox is a JavaOS server appliance running on standard PC hardware. This enables you to run java server applications without the need to install a host operating system. Only a standard Java HotSpot VM and the sanos kernel are needed.

Icon phone.png Michael Ringgaard(mri AT jbox.dk)
Icon site.png http://www.jbox.dk
Icon time3.png

Sartoris Microkernel

The Sartoris Project aim is to develop a portable microkernel and a set of operating system services that support: - Efficient implementation of local system calls. - Concurrent execution of several OS 'personalities', ie a UNIX environment and a native microkernel-based interface. - Simple and elegant integration of distributed operating system components.

Icon phone.png Nicodega(nicoba4 AT hotmail.com)
Icon site.png http://sartoris.sourceforge.net/
Icon time3.png

SauOS

SauOS is a 32-bit protected mode kernel written in C. It was initially based on bkerndev but is now being rewritten in a branch.

Icon phone.png imate900 (asteinborn SeventyEight AT Gmail DOT com)
Icon site.png http://sauos.googlecode.com/
Icon time3.png At present the kernel is being rewritten

ScorchOS

A 32-bit pmode OS aimed to be light-weight, fast, well-documented and easy to develop.

Icon phone.png Bob Moss(bobbyjmoss AT gmail.com)
Icon site.png https://sourceforge.net/projects/scorchos
Icon time3.png Regularly patched. Not currently under active development, but may be rekindled in the future.

Sea

A simple OS by piranha designed (eventually) for speed, stability and utility. It has multitasking, usermode, MM, FS, and various other lower functions. Has ata, ext2, and other drivers. A hobby OS would discribe it well.

Icon phone.png goldenpiranha "AT" gmail.com)
Icon site.png http://code.google.com/p/microsea/
Icon time3.png Working on 0.2 (Better resource locking, new userspace system, dynamic linking, priority schedulers, networking)

SharpOS

SharpOS is the original open source effort to write an operating system in 100% C#, with a strong focus on security, reliability, and maintainability. It has a wiki.

Icon phone.png '
Icon site.png http://www.sharpos.org/
Icon time3.png

Shunya Operating System

The project Shunya explores the fundamentals of Operating Systems and deals with creating a simple OS which can be loaded by a Multiboot Compliant Bootloader. Though it can't be called a complete OS as it just provides a bare platform for further development but it utilizes a C Library and other Memory Management Tasks.

Icon phone.png (shirish.goyal@gmail.com)
Icon site.png http://www.ideaconspiracy.com/books/os/shunya-operating-system/shunya-operating-system
Icon time3.png

SkyOS V3.0

32Bit PM, Paging, Multitasking, VM86, GUI (SkyGI/GiGFX), VFS,FAT12/16/32,SkyFS,ProcFS,DeviceFS,Network,TCP/IP,Keyboard, Serial,PS/2,IDE,ATAPI,FDD,RAMDISK,Soundblaster,VESA2.0,CT6xxxx, Dynamic loadlable modules, PnP, PCI, LIBC, SkyGI Library, Graphical Applications.

Icon phone.png Szeleney Robert(Robert.Szeleney AT br-automation.co.at)
Icon site.png http://www.skyos.org
Icon time3.png

smiddyOS

smiddyOS is an operating system that is written in FASM asm. It is mainly a learning environment for the author, with pretty loose goals.

Icon phone.png smiddy on BOS forum, Dex OS forum, or OS Dev forum as smiddy
Icon site.png http://smiddyOS.asmhackers.net/
Icon time3.png

Solar_OS

Simple, easy, fast 32bit GUI OS in ASM

Icon phone.png bogdan_ontanu @@ yahoo -- insert the dot here remove under score in name -- com
Icon site.png http://www.oby.ro/os/
Icon time3.png

SollerOS

A unix-based 32 bit operating system written in assembly-it has no connection to Solar_OS, the similar names are just a coincidence

Icon phone.png Jeremy Soller (jackpot51@gmail.com) I fear no spammers.
Icon site.png http://solleros.googlecode.com
Icon time3.png

Sortix

Sortix is a small Unix-like operating system developed since 2011 with emphasis on cleaning up traditional Unix design mistakes while retaining compatibility with third party software. Much third party software has been ported to Sortix and the system is now self-building. The Sortix kernel, standard libraries, and most utilities were written entirely from scratch.

Icon phone.png No Contact Information
Icon site.png http://sortix.org/
Icon time3.png December 19, 2013

spiderpig

32 bit operating system written in C

Icon phone.png Dak91 (dak.linux AT gmail.com)
Icon site.png http://spiderpig.osdev.it
Icon time3.png

Static OS

Foreign language OS Project

Icon phone.png 3(stafe AT gmx.at)
Icon site.png http://www.staticos.at.tf/
Icon time3.png

SubraX

Educational/Experimental Operating System with graphical interface support under Oracle VirtualBox. Whilst not yet usable it is growing relatively fast.

Icon phone.png bobbyjo ( AT ) love2code.org
Icon site.png http://www.love2code.org
Icon time3.png -- As of February 2011, my a remote server automatically builds nightly and uploads to sourceforge mirrors weekly. Typically a change is made weekly.

Sugatha RTOS kernel

Sugatha is an RTOS kernel with upto 8 priority levels. It is mainly written in C with the CPU specific code in asm.

Icon phone.png dushara (nidujay AT sourceforge.net)
Icon site.png http://sugatha.sourceforge.net
Icon time3.png June 28, 2007 -- Sugatha RTOS version 0.8.0 (beta)

SUNUX

SUNUX is aiming to be an networking OS for running web servers and DHCP server, etc.

Icon phone.png Andreas Tolfsen(ato AT itnerd.net)
Icon site.png http://sourceforge.net/projects/sunux
Icon time3.png

SyCODE Platform

SyCODE Platform is (not yet but will be) a 32bit pmode OS (multitasking) with GUI. The executable format will probably the PE. I will port an assembler, a C compiler, a linker, and I will port a basic compiler (I am writing it for DOS, it will support many features ported from C language).

Icon phone.png PrzemekG_(PrzemekG_ AT poczta.onet.pl)
Icon site.png http://przemekg.netfirms.com/projects.html
Icon time3.png

Synergy OS

Synergy OS is an operating system built for learning purposes. It's built from the ground up using only assembly and no C; nasm and GNU ld are required to build it. It currently has a 32 bit protected mode kernel and a keyboard driver. It's source is in the OS download

Icon phone.png nmp91@live.com
Icon site.png http://67.11.191.209/software/view.php?project=Synergy_OS
Icon time3.png

SysPak OS

SyaPak OS is a microkernel based multiprocessor, multitasking, multithreading operating system for the IBM-PC Intel i386 systems. It is developed in Department of Computer Science of Bahahuddin Zakariya University, Multan Pakistan, under the kind supervision of Dr. Aman Ullah Khan. SysPak OS is a operating system with an emphasis on design and portability. It is largely implemented in C/C++, with a small amount of assembly. Currently, the system is mostly a kernel with a minimal amount of user space libraries and applications. Thus far, most of the work has been put into the kernel and other underlying support. As a result the system isn't that interesting from an end-user point of view (no gui, simple commands on a command line). Full documentation is available.

Icon phone.png Abdul Salam(hdrsalam AT hotmail.com)
Icon site.png http://www.brain.com.pk/~hdrsalam/syspakos.html
Icon time3.png

T

tachyon

tachyon is another hobby OS, longing to support x86 and x86_64. currently, it boots on both platforms in qemu, bochs, virtualbox and real hardware. it has not much to see, really, but a working physical and virtual memory managment (still improving)...

Icon phone.png Markus Duft (mduft AT aon.at)
Icon site.png https://github.com/mduft/tachyon3
Icon time3.png In active development.

tatOS

A 32bit x86 OS written in assembly featuring a protected mode driver for USB flash drive and mouse. Source package includes tedit editor & ttasm assembler. Supports UHCI, EHCI, ps2 keyboard, 800x600x8bpp graphics.

Icon phone.png Tom Timmermann
Icon site.png http://code.google.com/p/tatos/
Icon time3.png In active development since 2009

TempOS

TempOS is an educational and multi purpose Operating System that was born as an undergraduate work and has it's your main goal to be not only another Operating System, but a complete toolkit designed to help students on their O.S. courses.

Icon phone.png Renê S. Pinto (rene AT renesp.com.br)
Icon site.png http://tempos-project.org
Icon time3.png Not updated since 2012

The Damn Small OS

An Exo-kernel where the application builds the system it self, providing the most basical functions for a multi-tasking system. All the response is thrown to the application, let it manage, but protecting the resources. An extreme approach of Operating Systems, that should be highly portable. 100% in C.

Icon phone.png the team(alphakiller_ AT msn.com)
Icon site.png http://sourceforge.net/projects/comos
Icon time3.png

the dr

It's a kernel for the IA32 architecture written in C and asm. It's based on the exokernel architecture but forks from it when simplicity can be gained.

Icon phone.png Gianluca Guida(gianluca AT drex.tk)
Icon site.png http://drex.sourceforge.net
Icon time3.png Inactive since 2005
Icon magnify warning.png The validity of this entry is questionable;
Inactive since 2005

Toaruos screenshot.png

とあるOS (ToAruOS)

32-bit modular kernel written in C. Supports pipes, shared memory, signals, POSIX-compliant file access and threading. Heavy focus on advanced GUI, including a compositing window system.

Icon phone.png toaru-l AT acm.uiuc.edu
Icon site.png http://github.com/klange/toaruos
Icon time3.png Active - building a network stack (May 8, 2014)

Toast!

Toast! is a the continuation of the discontinued Jaspos. It is being written in C and x86 Assembly, but is just taking its first few steps as Jaspos' code is pulled through.

Icon phone.png No Contact Information
Icon site.png http://batchbin.ueuo.com/programming/os/toast/
Icon time3.png Early stages

Trion

A portable nanokernel-based OS.

Icon phone.png Trion Developers Mailing List(trion-kernel-dev AT lists.sourceforge.net)
Icon site.png http://trion.sourceforge.net
Icon time3.png

Tysos

The type-safe operating system is a 64-bit multitasking microkernel written in C#

Icon phone.png John Cronin (jncronin AT tysos.org)
Icon site.png http://www.tysos.org
Icon time3.png Ahead-of-time compiler is mostly complete, work has switched to implementing the kernel

týndur

The microkernel-based community OS of the German OS development community Lowlevel.

Icon phone.png tyndur-devel mailing list (tyndur-devel AT tyndur.org)
Icon site.png http://www.tyndur.org/
Icon time3.png See the tyndur 0.2.2 announcement in the forum

U

U-OS

A German OS Project

Icon phone.png Jan Loebel(jan.loebel AT web.de)
Icon site.png http://uos.maep.de/
Icon time3.png 2005: Project was stopped
Icon magnify warning.png The validity of this entry is questionable;
WARNING! This URL Website is not in English.

UbixOS

It's Back :)

Icon phone.png Christopher Olsen(colsen AT UbixOS.com)
Icon site.png http://www.ubixos.com
Icon time3.png

udos: a micro disk operating system

udos is for PC/AT compatibles with legacy FDD.

Icon phone.png Katsuhiko Gondow(gondow AT cs.titech.ac.jp)
Icon site.png http://www.sde.cs.titech.ac.jp/~gondow/udos/
Icon time3.png

UNEXT/os aka (You Next /Operating System) v8.1.b (c)2009

c++ flat mode operating system by a.T.d current features:

  • flat mode memory module up to 4gig's of RAM
  • fat 12,16,32 driver
  • ps2 mouse driver
  • multi tasking
  • as usual CLI is supported
  • XGUI (open desktop): VBE2,800x600x256 and more, windowing system, buildin script language for GUI application development (Basic like language)
  • support 40% of DOS API (aka int 0x20,0x21,0x33)

Icon phone.png r_ed209 AT yahoo DOT CoM
Icon site.png [coming soon i hope coming soon i hope]
Icon time3.png 60% done

Useless OS

The Useless OS is made entirely in ASM compiled with NASM. It is currently a 16 bit Real-Mode OS with a FAT12 filesystem. It has around 30 system calls and an ASM header for developing applications for the UOS. Applications can be developed in ASM, or with a BASIC compiler called UBASIC (Useless BASIC) that was programmed in FreeBASIC. The UBASIC Compiler takes BASIC code and translates it to NASM code which in turn compiles it to flat-binary or .COM applications. The way the UOS multi-tasks is more like task switching in real-mode. A GUI is currently being developed. Future plans are to write a 32 bit p-mode extender, then port the GUI to use it for better multi-tasking. Note that our website is under construction.

Icon phone.png David Gutierrez (david dot primeproductions dot gutierrez AT gmail dot com)
Icon site.png http://www.uselessos.site11.com/
Icon time3.png [Version 0.1.10]

V

Valix

The Valix Operating System is a managed-code operating system. Valix runs no userland binaries: instead, an object-oriented interpreter is built into the kernel. This offers superior security (the only binary the CPU is directly running is the kernel itself) and faster speeds compared to other interpreters, since time is not wasted with context switching between kernelmode and usermode. Valix itself is written in GCC C, C++, and FASM Assembly under GPLv3; source code available at http://gitorious.com/valix . x86 architecture. Example of interpreted code at http://valix.org/wiki/doku.php?id=code_examples

Icon phone.png xvedejas and cfaust at #valix on irc.freenode.net, or xvedejas@gmail.com
Icon site.png http://valix.org/
Icon time3.png 2009, 2010, 2011

VolTroX Operating System

Codenames Chronos And Aurora, Two 16bit real mode operating systems developed by two teams Aurora And Chronos, They are both fat12 compatable, and will contain vesa gui, with simple memory management

Icon phone.png No Contact Information
Icon site.png http://gxp.yuku.com
Icon time3.png

VSTa

VSTa is a copylefted system, originally written by Andrew Valencia , which uses ideas from several research operating systems in its implementation. It attempts to be POSIXish except where POSIX gets in the way, and runs on a number of different PC configurations. VSTa is also designed to take advantage of SMP right out of the box.

Icon phone.png No Contact Information
Icon site.png http://www.vsta.org:8080/FrontPage
Icon time3.png

W

Wataha.net

Simple multitasking x86-64 kernel written in assembly language. Started since 1 January 2013. Name of operating system means "pack of" eg. wolfs/boars/lycaons. Kernel name: Cyjon (eng. Dhole).

Icon phone.png Andrzej Adamczyk (akasei at wataha.net)
Icon site.png http://wataha.net/?locale=en_US
Icon time3.png August 29, 2014 -- version 0.211

WISDOM

WISDOM is a 32-bit operating system with a primitive shell implemented. It is copyrighted under GNU/GPL license. WISDOM is also a research into the field of design of operating system.

Icon phone.png R Karthick & Anita Shelton(rkarthick AT gmx.net)
Icon site.png http://wisdom.sourceforge.net
Icon time3.png

X

X-OS

French OS Project

Icon phone.png AlAdDiN
Icon site.png http://xos.freezee.org/
Icon time3.png
Icon magnify warning.png The validity of this entry is questionable;
The website is down (August 2013)

Xenon

Xenon is a completely new breed of operating system inspired by Singularity, L4, Panda, and Vista. It combines software isolated tasks using type-safe code (C#) with a completely kernel free design that replaces the traditional kernel with a group of core services running in their own tasks. This design provides the best stability and security while improving performance. Xenon Software is my startup company that strives to think "nowhere near the box".

Icon phone.png FutureDomain
Icon site.png http://www.xenonsoftware.net
Icon time3.png Under Design

XEOS

XEOS is an experimental 32/64 bits Operating System for x86 platforms, written from scratch in Assembly and C. It includes a C99 Standard Library, and aims at POSIX/SUS2 compatibility.

Icon phone.png Jean-David Gadina - XS-Labs - www.xs-labs.com
Icon site.png http://www.xs-labs.com/en/projects/xeos/
Icon time3.png Active - Under Development

Xero MaLux

Xero MaLux, or MLX for short, is an operating system which is completely based on *nothing*. The aim is simple. Strive for efficiency in its purest form. It is written in C, later to be ported, and entirely developed, in ASM.

Icon phone.png connorwood71 [at] googlemail [dot] com
Icon site.png http://xeromaluxdl.blogspot.com/
Icon time3.png Graphics, and basic Memory Manager working. Quasi-window manager.

XOmB

General purpose OS built on top of the XOmB exokernel. Aims to do away with the legacy crap of x86 and utilize the features of x86_64 to their benefit. Devices as given to the user with the most minimal of abstractions. The kernel itself is multicore 64 bit only. It supports multicore scheduling, a userspace keyboard driver, a userspace VESA driver (through x86 emulation), and is actively developed by a group of undergraduate and graduate students.

Icon phone.png wolfwood or untwisted or wilkie or steveklabnik(on the forums)
Icon site.png http://github.com/xomboverlord/xomb/tree/undead
Icon time3.png In progress

XOmB Bare Bones

A Bare Bones OS written in the D programming language. Fully 64 bit.

Icon phone.png wilkie or steveklabnik(on the forums)
Icon site.png http://github.com/xomboverlord/xomb-bare-bones/tree/master
Icon time3.png 1.0.0 released

Y

yaMOS

yet another "My Operating System"

Icon phone.png h.hornbacher (h.hornbacher AT googlemail.com)
Icon site.png http://ya-mos.sourceforge.net/
Icon time3.png

Z

Zephirum OS

An interpreted OS from v0.0.2 with extreme security. Originally it was aimed at being a POSIX compliant system, now it is no longer a unix based OS. Can perform parallel processing. Written in x86_64 assembly.

Icon phone.png Arjo Chakravarty (arjo129 [at] gmail [dot] com)
Icon site.png http://code.google.com/p/zephirum-server/
Icon time3.png -- Working on version 0.0.2

ZoftOS

ZoftOS is a Intel 80x86 based OS that **will** (subject to change) provide support for VFAT and ext2 with different executable file formats supported. Written in C/C++ (gcc) and assembly (nasm), unde Win/DOS using Bochs (for testing anyways). Main purpose __was__ to develop a smarter shell, that could recognize and learn different commands and shell scripting that's more flexible.

Icon phone.png Ben Hsu(ben.sunghsu AT att.net)
Icon site.png http://zoftos.sf.net/
Icon time3.png

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