From SuperTuxKart Development Team:
SuperTuxKart is a 3d kart racing game. You can play with up to four friends on one PC racing against each other, or beat the computer. Race under water or in space, watching the stars passing by. You can do a single race against other karts, compete in one of several Grand Prix, try to beat the high score in time trials on your own, and play battle mode against your friends.
What's new in this version:
Version 0.8 has updated Fort Magma track and Sand track.
-Fun Controls (I played with an xbox360 controller)
-Appropriate for kids
-Fun and unique powerups
-Completely volunteer made! It's really cool seeing so many people work together just because they love it.
-Open source and still being improved. The game will only get better.
-Unlockable characters and levels
-A couple times the menus disappeared in about a 6 hour playthrough. I just restarted the program and it fixed it.
-Some controllers make controlling karts difficult (if you're computer is windows I highly recommend the xbox360 controller)
STK will be familiar with anyone whose ever played a kart racing game like Mario Kart or LittleBigPlanet Karting. I played multiplayer with my girlfriend and it worked great. I am going through and unlocking all the levels right now. I will post a more thorough review when I'm done.