Top-down dungeon crawler
LAIR is a Sandbox Dungeon Crawling Game
Fast paced action RPG with retro graphics style
Argentum Online is an onlie role playing videogame
Up to date MUD client evolved from the original MudMaster
A simple telnet (and possibly SSH) server
Azmyth Game Framework
PHP WOW Battle.net Armory Raider
Opensource clone of Celeborn's Dark Legacy MUD