FREESECS is an open-source project for SEMI SECS standards. The software is compiled with GNU autotools/GCC and runs on Linux, MacOS X, NetBSD. See http://opensecs.sourceforge.net
The FunnyRobot project designs an educational robot controller that is programmable via USB. Both the hardware and software are configurable and extensible. Users can build programs with a C++ library and run them under a real-time operating system.