SuperTuxKart is a Driving Game for PC. It's a free-software Mario Kart "clone" which features the most well-known free software mascots, including Tux, (Linux's mascot) Firefox, (Firefox Browser's mascot) Wilber, (The Gimp's mascot) and GNU. (The mascot for all things free software) The game runs under the Irrlicht Engine. The game can be downloaded for free here. Not to be confused with Tux Racer.