irssi-icb (irssi plugin for ICB)

ICB (International CB) is a teleconferencing system that allows
Internet users to participate in realtime online discussions (similar
to IRC). irssi-icb is a plugin for the irssi IRC client that allows it
to chat on the ICB network.

See /usr/doc/irssi-icb-*/README for directions on how to load the
module into irssi and connect to an ICB server.