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Haiku is an open-source operating system currently in development designed from the ground up for desktop computing.112 weekly downloads
FreeOS/1 is a Free, Open Source, FreeDOS based Free and Open Source Alternative OS, with open source Microsoft Windows compatibility using HXDOSExtender KernelEx,and ReactOS source code. FreeOS/1 will include new technologies and will be easy to use24 weekly downloads
An open source operating system for x86.3 weekly downloads
Embedded Operating System2 weekly downloads
XSystem Kernel Project - an object-oriented 32-bit protected-mode operating system for IA32-architecture.1 weekly downloads
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.1 weekly downloads
The project aim to create a microkernel-based operating system from scratch.1 weekly downloads
A special-purpose 4.4BSD-based UNIX-like operating system, designed for machine control applications. Using low-cost hardware, FabBSD can be used to control a wide array of CNC milling machines, lathes, routers, process-control and automation equipment.1 weekly downloads
SDK for Jobo AG's Giga Vu Pro Evolution device. Includes tutorial.1 weekly downloads
Media Lab Asia collaborated with IIT Delhi for development real-time kernel O/S named “RTKER OS” portable on microprocessor based systems and a Multithreaded O/S for 8-bit microcontrollers (like 8051 and ATMega128) as low cost embedded solution.1 weekly downloads
SuperWikia: The Runtime/Realtime Environment for Codesmiths1 weekly downloads
AxionOS is (to be) a operating system for the Axion Prototype Computer (APC) which is basically a notebook. Currently the project is in its childhood, but the idea is simple - To create an intuitive, user-friendly operating system for the APC.
CJet eXTreme OS is a new project to develop a cross platform operating system with a native application interface designed to make it easy to develop for several architectures at once.
Cellocity Linux is Based on Fedora Core 6 Source Code. With only basic core elements needed to operate Compatipal and a completley Graphic Interface as well as Text. Version 2.0 will include more applications 32,64 bit and 80 Core Intel CPU
New Linux Based OS primarily for smart devices and PDA's, laptops, and eventually desktops. It offers an alternative to the "embedded" approach. All OS versions and applications will be hosted and then made available to the subscribers of cloud svs
The future of information technology will be based on controlling the flow of natural light. This project is an attempt to establish the code (or software) that will enable this to happen. It involves rewriting an OS from the ground up.
FOS - open source 32-bit microkernel operating system.
GJ Universal OS is a operating system that aims to be binary compatible with windows, while having a nice look and feel.
The Isis OS Project Is a Controlled Project to Develop An Advanced Modern Operating System!
Learn, Adapt, Store, Evolve, and Retrieve
MightyOS is a serious attempt at making a fast and lightweight Operating System written in C++.
The main goal of this project is to provide open source alternative to proprietary operating system used in Motorola p2k mobile phones(not smartphones).
Story OS is a small microkernel system with object-oriented service interface.
A desktop operating system project to help one getting things done.
Turtle OS is an Unix-like OS. It aims to be open source, secure, high performing and portable.