Hobby operating system, bootloader, kernel, drivers, C library
Scalable, optimized, secure RTOS for multiple hardware architectures
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
Mulithreading Arduno library
Chromium + Ubuntu = Cub Linux
Android, DOS, FirefoxOS, Linux, MacOS and Windows all in one..
An indie, hobby operating system
Small real time operating system for AVR and ARM microcontrollers
Embedded Real-Time Operating System (RTOS)
A new OS
Crosos is a SubLinux Distribution
Hard Real-Time OS compliant to the Osek/Vdx standard.
Nanux Kernel
Mayax is a 32-bit hobby OS with windows style GUI.