FreeRTOS Real Time Kernel
- Project page: news, forums, support, CVS, bug reports, feature requests, statistics. SourceForge.
- http://sourceforge.net/projects/freertos/

Wittenstein High Integrity Systems
- High integrity engineering design, development, production; focus: software, safety critical engineering of software and systems; makes and supports FreeRTOS variants SafeRTOS, FreeRTOS-pro. Bristol, UK.
- http://www.highintegritysystems.com/

FreeRTOS
- Growing article, with links to many related topics. Wikipedia.
- http://en.wikipedia.org/wiki/FreeRTOS