A BSD-based OS project that aims to provide an experience with MacOS
NVIDIA Linux open GPU kernel module source
Scalable, optimized, secure RTOS for multiple hardware architectures
Hobby operating system, bootloader, kernel, drivers, C library
The classic Platinum desktop, reborn for modern PCs
Real-Time Event Frameworks based on active objects & state machines
Low power application-configurable Operating System
It's a personal microkernel project designed as a learning ground.
A cute and educational x86 OS
OS bootable from Linux,Windows and others partitions as auxiliary OS
PRTOS is a simple, compact preemptive RTOS for embedded systems
A UNIX-like kernel for the i386 architecture
Mulithreading Arduno library
Chromium + Ubuntu = Cub Linux
Android, DOS, FirefoxOS, Linux, MacOS and Windows all in one..
An indie, hobby operating system