Lich is a cross-platform multithreaded interpreter meant exclusively for use with text-based MUDs. The application natively supports the Ruby language as well as the Simutronics "Wizard" script standard including their StormFront expansions.
This is a 2d tile-based RPG (Role Playing Game) engine targetted at the J2ME / MIDP application platforms (PDAs, java-enabled cellphones) but is also cabable of running on a J2SE enabled platform (either applet or stand alone java app).