BumpRace
   Arcade race for Windows, Linux, or BeOS. Get to the finish line without crashing into deadly blocks.
   http://user.cs.tu-berlin.de/~karlb/bumprace/

ID-Car
   A multiplayer 2D car race for Linux in which you must destroy opponents or win the race. (Open Source)
   http://idcar.free.fr/en/

OpenGL Racing
   A Star Wars racer style game for Linux coded in pure C.
   http://projectz.ath.cx/?id=70

Race
   A 2d arcade overhead car racer for Windows or Linux with computer opponents, music, sound effects, and a track editor.
   http://race.sourceforge.net/

Space Race
   A contest in outer space for DOS.
   http://qewl.com/spacerace/spacerace.html

Trophy
   A 2D car race for Linux. (Open Source, GPL)
   http://trophy.sourceforge.net/index.php3

XRally
   A Linux clone of the classic Rally X arcade game. You control a blue (good) car, that has to collect yellow flags around a maze-like map, while avoiding the red (bad) cars. (Open Source)
   http://www.linuxgames.com/xrally/