"Skrull" Adams has been making mods and addons for games for years. The most notable (and easiest to find) are mods to play "Boo" on Baldur's Gate I/II and Icewind Dale I/II, and the World of Warcraft "Tongues" Addon.
Other works include a 3D Map viewer for Ultima Online, a Serpent Isle map for private Ultima Online servers, a Fallout Tactics mod to let you play as a different animals / creatures already in game, a web server running off of mIRC scripting language internals, a AIML engine that responds to voice commands,
Future World of Warcraft projects (aside from Tongues enhancements) will most likely include a multiplayer XiangQi (Chinese Chess) game, multiplayer Western Chess game, multiplayer Texas Hold 'em or other games.