GeneRally (http://koti.mbnet.fi/grally/) is a fun little arcade racing game for Windows. The gameplay is very similar to Slicks 'n' Slide, but the graphics are 3D, so the tracks have true hills and height differences. You can play against up to 5 human or computer players on one computer, but there is no network play, at least not yet. Weapons are not included (which is good), but the cars take damage from collisions and slow down when damaged enough. Cars can be repaired at pits, if the track includes them.
The game includes a track editor, and there is a huge supply of fan-made tracks already available, which you can download from GeneRally's home page. You can of course make your own tracks, although the editor is quite unergonomic and difficult to use.
Overall, the game is very entertaining and addictive, especially when played against (preferably many) human players. It's still in constant development, so maybe we can hope for multiplayer over network and a more user friendly editor in the future. It's also absolutely free. Several thumbs up!