Roleplaying

Castle Infinity - This character based game is part platformer, part puzzle, part adventure, and part chat room. Serves players from teen to adult.
www.castleinfinity.com/

Double Moon Cyber Stables - Players buy, sell, breed, and take care of virtual horses.
www.angelfire.com/rpg/doublemoonstables/

The Kingdom of Shay'zrenth - A fantasy medieval roleplay based on message boards. Also includes rules, help and joining information.
shayzrenth.tripod.com/

Land of the Mystic - A roleplay based in a message board.
www.invisionfree.com/forums/Land_of_the_Mystic/

The Medieval Times - A medieval roleplay based in a message board.
kumari.proboards24.com/

The Sphere Simgame - Players post on message boards as either good or evil horses.
www.geocities.com/thesphere00/thesphere.html