Universal server
A single-user single-task ROM-based OS for my 8-bit homebrew computer
NES/Famicom emulator based on FCE Ultra.
A multi-threaded-style OS for the Spectrum +3
Ubuntu-based Linux Gaming OS
A UNIX-like kernel for the i386 architecture
Reductively Architected Breviloquently Built Information Environment
Written in pure ASM and Exode with cloud computing in mind.
A universal P2P file sharing client for Windows
HellGate™
AmiSSL – OpenSSL wrapper for AmigaOS-based systems
AO RTOS is small real time OS based on Active Object concurrency model
Neptune is a kernel and operating system for x86 PCs.
Embedded Real-Time Operating System (RTOS)
An open source OS written in assembly.
A new OS
A low-power ISA design and simulator for a 2010 IEEE competition
a secure, open source OS for use inside USEagency facilities
Simple, Fast, Advanced... ZintoriOS. Made in Wellington, New Zealand
Netxserv solution de telecommunications
Project has been move to https://github.com/ciaa/Firmware
Crosos is a SubLinux Distribution