A primer on (traditional) tabletop roleplaying gaming.
A simple tabletop rules engine.
A Fairy Tale Adventure Game
A Tunnel Goons Variant And Adventure
A quick generator of anti-canon relations.
A Tabletop RPG Design Toy
A system of magic for tabletop roleplaying.
A rules engine for tabletop roleplaying.
Procedural Tabletop Fantasy Setting Builder
A series of fill-in-the-blanks situation generators.
A theoretical glossary for tabletop roleplaying.
An in-development d20-based fantasy RPG.
A d20-based rules engine... from 2005.