Open Source Server Operating Systems Operating System Kernels

Contiki is an open source, highly portable, networked, multi-tasking operating system for memory-constrained systems. Contiki current source code: https://github.com/contiki-os/contiki Contiki historical source code: https://github.com/adamdunkels/contiki-1.x

ChibiOS/RT is a free and efficient RTOS designed for deeply embedded applications. It offers a comprehensive set of kernel primitives and supports many architectures: ARM7, Cortex-M0, Cortex-M3, Cortex-M4, PowerPC e200z, STM8, AVR, MSP430, ColdFire, H8S, x86.

JNode is a Java New Operating system Design Effort. JNode is a simple to use and install Java operating system for personal use on modern devices. Any java application runs on it, fast and safe. See our homepage for additional information.

Syllable Desktop is a complete operating system that is easy to use, powerful, lightweight and extraordinarily fast and responsive. It has its own kernel, filesystem, GUI and applications. Syllable Server is a matching small and efficient Linux server.

Cooperative Linux is the first method for optimally running Linux on Windows and other operating systems natively. It is a port of the Linux kernel and support code that allows it to run cooperatively without emulation along with another operating system.

7-max increases the performance of some applications up to 10-20%. Windows uses small (4 KB) RAM pages by default. 7-max allows to use large (2 MB) RAM pages.

This project reimplements from scratch the RPL language made popular by HP programmable calculators, in portable C/C++. The main goal is to release a complete computing environment for various targets. There's currently 4 active targets: the HP 50g, HP39gs and HP40gs calculators and a PC simulator (see the downloads section!). Other ports are planned for the future.

UUMATE is a respin of Ubuntu Mate (https://ubuntu-mate.org/) The main goal of this project is simple: Just have an updated Ubuntu Mate 64bit ready to install, with full multimedia support, compiz, many extra applications and some cosmetic changes. Many PPAs/Repos already available. Event sounds (minimize, maximize, close, etc...) enabled by default you can enable/disable compiz using "mate-tweak"! No need to download hundred megabytes after installation! Note: To burn the ISO to a USB stick, use "dd" command. In MS Windows use Rufus. This ISO is helpful for people trying to install linux for the first time or coming from windows environment. It has plenty of software pre installed (some are trial/shareware) with full internet and multimedia support. Very useful as live media as well. It has audio/video codecs, flashplayer, java, googletalk, telegram, twitter, etc... Changelog: http://sourceforge.net/p/uumate/blog

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

A Linux operating system, designed and developed to be beautiful, simple, fast, and stable on many computer hardware.

TempleOS is a 64-bit kernel with compiler, graphics library and tools. It is not a Unix. It was made from scratch.

Open Source SW/HW Project for Embedded Ethernet Applications. Works with AVR ATmega256/128/103, AVR32, SAM7X, SAM7S(E), SAM9, AT91X40, GameBoy Advance, Cortex M3 / M4 (STM32, NXP LPC, LM3S), Freescale Coldfire, RTL8019AS, LAN91C111, CS8900 and DM9000E chips. Offers a tiny TCP/IP stack including HTTP, FTP and DHCP.

HamserOS is our attempt to build a cute and furry operating system from scratch. Just for fun and a love of hamsters.

chaos is a new operating system - written from scratch by a young group of people. Unlike most other systems, we do not try to reimplement something else, but rather tries to do things in our own (hopefully better) way.

O BRLix é um projeto que visa atender aos usuários de Desktop que possuem dificuldade em utilizar as interfaces gráficas atuais do Linux. Com uma interface já conhecida, e aplicativos que facilitam o trabalho, diminui-s.e a curva de aprendizado e torna-se amigável a utilização de um GNU/Linux por um usuário Leigo. The Brlix is a project to help users who have difficulty using the current Linux graphical interfaces. With an already familiar interface, and applications that facilitate the work, the learning curve is decreased and becomes friendly to use a GNU / Linux for a layman user. Usem, Compartilhem, Discutam, nos dêem feedback! Use, share, Discuss, give us feedback!

Native Oberon Operating System

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

Cryogen is an experimental, distributed operating system.

The Orlean Microkernel for Desktop Computers.

Fireball (FSD) Amoeba is a distributed operating system. It collects a huge varity of single machines connected over a (fast) network to one, huge computer.It's a full Operating System Distribution. Based on Amoeba,Vrije Universiteit.

*** Genode migrated to https://github.com/genodelabs/genode *** The Genode OS Framework is a tool kit for building highly secure special-purpose operating systems. It scales from embedded systems with as little as 4 MB of memory to highly dynamic general-purpose workloads. Genode is based on a recursive system structure. Each program runs in a dedicated sandbox and gets granted only those access rights and resources that are needed for its specific purpose. Programs can create and manage sub-sandboxes out of their own resources, thereby forming hierarchies where policies can be applied at each level. The framework provides mechanisms to let programs communicate with each other and trade their resources, but only in strictly-defined manners. Thanks to this rigid regime, the attack surface of security-critical functions can be reduced by orders of magnitude compared to contemporary operating systems.

LainOS is an OpenSource project that seeks to revolutionize the the user experience by bridging the realm between \"Alien Elegance\" and Human Usability, and thus create a truly new and unique interface that is user savvy and beautiful.

Simplest of possible ways to multithreading on the smallest microcontrollers. This project is demonstration the programming technique of the multithreading with polling the system state. Published code debugged and ready to use in your projects.

ROME is a modular, multitasking, embedded operating system. The system is highly modular, with functionality split between multiple processes. ROME provides a zero copy architecture where references to data are passed around.

SimOS is an OS that will be based on the OSKIT function library. In addition we will be maintaining the oskit as a seperate release, updated as the core of the kernel. This OS will be easy to use, with numerous software versions on it.