An operating system based on the best Windows NT design principles
A bleeding-edge, security-centric Arch-based Linux distribution.
A microkernel-based multiserver operating system written from scratch.
Real-Time Embedded Operating System
Kestrel is an experimental kernel runs on i386
A small operating system, compatible with MS-DOS, written in assemly
a secure, open source OS for use inside USEagency facilities
Hobby OS with high ambitions