Cooperative multiplayer graphical RPG and adventure game
Arianne is an engine to develop multiplayer online games like Stendhal
Provides a full suite of clients and servers for virtual worlds.
Mud Server in Python Language playable via web browser
LAIR is a Sandbox Dungeon Crawling Game
Server software written in Python that implements the MUCK protocol.
Scriptable GTK based Python MUD Client
A free Python 3 text-based MUD game server