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An open source operating system for x86.3 weekly downloads
A fork of ReactOS which aims to be compatible to the NT architecture (but not a clone) meeting WINE's standards every time a part of NT interface is implemented. The fork was done at revision 9494 before ReactOS changed slowly into Tinykrnl.1 weekly downloads
Blueport is an italian Open Source 32-bit operating system ... This project has temporarly moved to Gna.org: <a href="http://gna.org/projects/blueport">Blueport project</a>1 weekly downloads
THIS PROJECT IS INACTIVE!!1 weekly downloads
A unix like operating system with complex but fun ways.
G/Linux is a set of tools, profiles and specifications to build linux distributions.
MightyOS is a serious attempt at making a fast and lightweight Operating System written in C++.
Story OS is a small microkernel system with object-oriented service interface.
Can emulate old computer on text the code pogram ideal to create kernel for operating system The begin the project the can emulate CPU(8080)and z80.
Pearwin is a unix like operating system, written in C, C++, Assembly, and other languages. This is a hobby/home OS, designed for home use, but can be professional (if you can find an application!).