Open Source Desktop Operating Systems Operating System Kernels

ReactOS is an open source effort to develop a quality operating system that is compatible with applications and drivers written for the Microsoft Windows NT family of operating systems (NT4, 2000, XP, 2003).

The AROS Research Operating System is an effort to implement an Open Source and portable operating system that is compatible with AmigaOS(TM). Originally, it was meant as a direct reimplementation, but already has features not existing in AmigaOS.

FreeDOS is an open source DOS-compatible operating system that you can use to play classic DOS games, run legacy business software, or write new DOS programs. Any program that works on MS-DOS should also run on FreeDOS.

GPL source for QNAP Turbo NAS

This project is an effort to develop open source software for all old platforms, like MSX, Commodore, AMIGA, Atari, ..... and collect technical information about old platforms, keeping the "old skool" flame alive.

The Transparent Inter Process Communication service can best be described as a cluster wide equivalent to the Unix Domain Socket IPC, but with much more features. Go to http://www.tipc.io for more details.

DOS/32 Advanced DOS Extender is a drop-in replacement for the DOS/4GW DOS Extender and compatibles. Being fast, small and flexible DOS/32A can be used in many environments, from embedded systems to DOS emulators, by both developers and end users alike.

First version of OpenVPN opensource software that is compatible with IPv6.

Components supporting real-time, reliability, high-availability, and security services in standard operating environments. Starting with the C5 modular microkernel, a RT-POSIX layer based on FreeBSD 4.1, and the CDE cross-development environment.

nxtOSEK is an RTOS for LEGO Mindstorms NXT. nxtOSEK consists of I/O driver part of LEJOS NXJ, TOPPERS/ATK1 RTOS, and glue code for them. You can write applications for NXT in ANSI-C/C++. Check nxtOSEK site: http://lejos-osek.sourceforge.net

DOS-C Kernel is an MS-DOS compatible kernel and the original FreeDOS kernel.

Public Domain Operating System (currently x86 and 80386 and S/370 and S/390). Note that latest source code is here in git, but latest executables and packaged source are at http://pdos.org

Haiku is an open-source operating system currently in development designed from the ground up for desktop computing.

This project is for the portable computer "Cambridge Z88", produced by Sir Clive Sinclair (of ZX Spectrum fame). We continue to support software development (ROM, 3rd party apps on memory cards and desktop applications). We have moved to https://cambridgez88.jira.com/wiki (development, source code and documentation). However, we continue to publish files for download here.

Schillix is a complete OpenSource operating system based on the source code of OpenSolaris.

This is GIMI, the Graphical Interfaced Multitasking Interpreter. One of the few GUIs made in QuickBASIC featuring multitasking. This one has its own script language for making programs, damm fast SVGA modes, lots of programs, and more!

Longene ( Linux Unified Kernel ) is an open source project sponsored by Insigma Co., Ltd. It aims to implement a kernel module in Linux that provides a system-call and driver layer to allow the Windows applications to run on the Linux OS.

Linux kernel patch to allow 8086/DOS programs to be executed in virtual 8086 mode under 64-bit Linux

While I may have started with Linux 0.11, I've expanded this to include several older relases of the Linux kernel that you can cross compile from Windows, and run on Qemu. I've managed to get the older versions of the software tools running on Windows, so that there is no major invasive source changes, outside of either broken drivers, or massaging the makefiles to find things in the new paths, and calling the appropriate tools where needed. Linux 0.10 is the first oldest version of Linux that is somewhat usable. While it lacks things like TCP/IP, and robust filesystems, it does offer a small kernel size, perfect for playing around with. You can comfortably make changes on Windows, re-compile and test all from a 'normal' desktop.

This site will be a gift to MenuetOS, a 32 bit assembly coded operating system from Finland, Russia and Hungary.

Développé par SAVEE, KAR Economie d'Énergie offre une solution innovante de gestion énergétique pouvant réduire la consommation jusqu'à 48 % de votre appareil informatique. Voici comment : - Optimisation de la RAM : Réduit la consommation en optimisant l'utilisation de la mémoire vive. - Refroidissement CPU : Utilise des techniques électroniques pour maintenir la température du processeur à des niveaux optimaux. - Gestion de la Fréquence du Processeur : Ajuste intelligemment la fréquence pour économiser de l'énergie sans compromettre les performances. - Mise en Veille Intelligente : Gère la mise en veille, même en présence de programmes actifs, pour économiser efficacement de l'énergie. Optimisez dès aujourd'hui votre consommation d'énergie avec KAR Economie d'Énergie et contribuez à un avenir plus durable.

Tesoro is an open source operating system project fully written in x86 Assembler language. The architecture is partially based on some QNX ideas and some fresh ideas. It combines low level assembler coding (e.g. microkernel with extremely fast task switch

ATOS is a lightweight real-time operating system. It supports pre-emptive scheduling and intertask communication in embedded systems.

BNL OS is a free, modern operating system based on the design of Windows XP/2003.This is not a Linux based system, and shares none of the unix architecture. Please remember, this is in the development stage, and is not reccommended for everyday use.