Arse Race
- A variation where you bet on buttocks instead of horses. Includes a high score table.
- http://www.arserace.com/

eDerby
- eDerby is a web-based game that allows up to 10 players per game to enjoy a fast-paced game of wagering on simulated horse-races.
- http://www.survivorsoft.com/

StableKing
- Free online multi-player horse racing game. No knowledge of horse racing required. Suitable for players of all ages.
- http://www.stableking.com/