The SuperTuxKart Openstreetmap mod focuses on using real life terrain from openstreetmap to be incorporated into the tracks. It also uses an older version of STK (namely 0.7.3) to allow people with less powerful computers to play the game as well, and to create a better balance with the graphics of the tracks themselves.
Patches supertuxkart v0.7.3 so it has the updated help and also has the html pages added. The actual mod game changes (new powerups/weapons/karts) are...