Pangaea will be a robust and feature filled game engine built using Allegro (http://alleg.sourceforge.net) It will be similar to Final Fantasy 1-3, etc., complete with map editor/world builder.
A graphical isometric multiplayer virtual reality server in MUD-style. Rooms and server code can be changed online. At the moment, there is also an IRC link. Clients are available in Java and Python/C.
Muq is a network server that goes several design generations beyond MOO or Java in providing support for applications characterized by these five requirements: Multi-user, Persistent state, Complex data, Complex code, and Distributed networking.