freeRTOS for Arduino Uno, Goldilocks 1284p & Mega 2560
Portable Penetration Testing Operating System
A microkernel-based multiserver operating system written from scratch.
The first OpenSolaris based distro (since June 2005)
The OpenSolaris source base (OpenSolaris-ONNV) maintained version
UNIX/LINUX and legal homebrew software on the xbox360 gaming console
My FreeDOS Floppy Disk Distribution
FreeDOS is an open source DOS-compatible operating system
Lorena es un sistema operativo escrito en C, C++ y Ensamblador.
Linux source-level kernel debugger
A multiplatform, DOS-like operating system
CAN bus device driver
Nanux Kernel
An operating system written in C & assembly.