Extreme Tux Racer is a downhill racing game featuring Tux, the Linux penguin. Your goal is to slide down on snowy and icy hill as fast as you can, and also collect some herrings on the way to try to get a place in the highscore list. There are different terrain types: You will slide faster on ice and slower on mud, you also have to avoid some obstacles like trees and bushes.
There are also two simple cups where you have to beat the clock and collect herrings. As of version 0.7.2, the game features 46 tracks and 5 characters (including Tux).
It is free software.