Bluemud - Project to rewrite the Varium MUD server in Java, incorporating a Python interpreter for world development. CoffeeMud - MUD server written in Java. The site contains news, related links, documentation, and the source code. DUMB - The Diabolically Uncrashable Mud Builder. Mud server implemented in Java consisting of a Lisp-like language interpreter for the creation of MUDs. JUDGE - Java Universal Distributed Game Engine - based on a client/server architecture and written entirely in java. Key - Mud server written in Java boasting full telnet support, object property reflection, and a transparent storage management mechanism. Momoko - An open source, modular, extensible platform for building multi-user environment. Written in Java. PAiN - General purpose mud engine designed to be flexible. Site offers downloads and documentation. Groovy Mud - Flexible mud engine using Groovy scriping. Site offers downloads and documentation.