ChibiOS/RT is a portable, open source, compact and extremely fast Real Time Operating System.
Here you will find all my ports and a short overview.

Nut/OS is a modular, open source, real time operating system for embedded platforms. It is easily configurable and optimized to run on 8 and 32 bit microcontrollers. Here you will find some of my
ports which are working with CrossWorks for ARM.

TNKernel is a compact real-time kernel for the embedded 32/16/8 bits microprocessors. Here you will find some ARM7 and Cortex-M3 ports for CrossWorks for ARM.