psyBNC is an easy-to-use, multi-user, permanent IRC-Bouncer with many features.
Some of its features include symmetric ciphering of talk and connections
(Blowfish and IDEA), the possibility of linking multiple bouncers to an
internal network including a shared partyline, vhost- and relay support to
connected bouncers and an extensive online help system.

Homepage:
http://www.psybnc.at/
