TeensyMUD is a very simple mud server written in Ruby. It uses a multiplexed single-threaded network driver using Acceptor/Reactor? and Observer patterns and YAML formatted text files as a database. It is also a pure event driven system where all game objects communicate with each other via events.
This server was initially created in response to an Aprils Fool’s joke posted by Erwin Andreasen on TheMudConnector? forum announcing a 1K mud contest. Those obfuscated versions can be found in the FTP directory under the names t1k1.tgz to t1k4.tgz.
Does TeensyMud have a future? Who knows? I don't.