RARS
Robot Auto Racing Simulator
RARS is the Robot Auto Racing Simulation, a competition for programmers and an on-going challenge for practicioners of Artificial Intelligence and real-time adaptive optimal control. It consists of a simulation of the physics of cars racing on a track, a graphic display of the race, and a separate control program (robot "driver") for each car. All RARS software and activities are free and open to the public.
http://rars.sourceforge.net/