Boots into many systems and GRUB2 ones!
AO RTOS is small real time OS based on Active Object concurrency model
freeRTOS for Arduino Uno, Goldilocks 1284p & Mega 2560
Open-source RTOS and Embedded Systems Toolkit for C++ and C
Run Linux on Windows or other OSes, natively.
CMAKE build enviroment for LPC2000 and LPC17xx Cortex MCUs
a very fast full system simulator
Smart home thermostat with touch screen and home automation
A True Web Operating System