Itemizer is a small application that lets you define attribute sets for (C)RPG items, create item catalogs from these sets and edit the item data in the catalogs. Itemizer can also be used to manage character and other game entity data in (C)RPGs.
Strategia is a heroic-fantasy role playing game developped in Java. It is in 2D and the subtlety is that the player must create a class to make his character moving or attack.
"World of Waiting" will be a plattform independent Open Source selfplaying online roleplaying game. It will give you the ability to see your character hack'n'slay his way through randomly generated tile-based dungeons.
Multi-User Character Kingdom (MUCK) engine and client providing a first person view point 3D-world which can be created by users, and which uses a system to provide quick gameplay by slowly downloading Objects/Textures over time once in the world.
Alfaws is a customizable, multi-user game engine. Every object, character, & room is programmed to respond to events. Players can customize their own event handlers, thus changing their fighting style or having their character behave as they would.