psyBNC by the most psychoid

Description: 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. Many other helpful functions are included. It compiles on Linux, FreeBSD, SunOs and Solaris.

Official website: psybnc.org