Monochrom's Massive Multiplayer Thumb-Wrestling
- Explains the basics as well as multi-player variations. Includes photographs.
- http://www.monochrom.at/daumen/netzwerk-eng.htm

Wikipedia - Thumb Wrestling
- Description of how the game is played.
- http://en.wikipedia.org/wiki/Thumb_Wrestling

Samurai Thumbs
- Describes how to play this game using helmeted thumb wrestlers as warriors. Includes some variations.
- http://www.deepfun.com/thumb.htm

Thumb Wrestling
- Describes how to thumb wrestle, with a snake in the grass variation.
- http://www.gameskidsplay.net/games/other_games/thumb_wrestling.htm