TinyMud was a mud server written by Jim Aspnes built in August 1989 and unleashed upon the world in December 1989. Inspired by both Alan Cox's AberMud? and Rick Skrenta's Monster, it inspired a whole family of mud servers (see TinymudTree). It was a simple, clean and very clever design.

TeensyMud's first major milestone before it can rightly call itself a mud worthy to be run by anyone is to have the equivalent feature set of TinyMud.