JamochaMUD, an open-source Java MU* client.

JamochaMUD offers unicode, plug-in, and multi-language support
(currently 8 different languages) to allow a more enjoyable
MUCKing/MUDding experience!  Featuring multi-mucking, 
command history, synchronized window movements, 
experimental Socks5 support, user defined variables and definitions,
and greatly improved ANSI colour support.  Plays nice on *nix 
systems, supports a wider range of MU*'s than before, and also 
includes emulation of some TinyFugue editor controls.
All this while still only using Java 1.1.  See the read.me for 
more information!
The latest version of JamochaMUD can always be found at
http://jamochamud.anecho.mb.ca
  