This is a nice project that can be used to introduce people to C/C++ programming, AI programming, etc. I've been having great fun with it and plan to submit a driver/robot of my own when I get one developed that places somewhere other than last. This makes me wish I had a faster machine as I can't really use the OpenGL view of the races, but would like to.
An open, cross-platform journaling program.
A scientific plotting package.