irssi - Irssi is a terminal based IRC client for UNIX systems.
Pidgin - Pidgin is an easy to use and free chat client used by millions. Connect to AIM, MSN, Yahoo, and more chat networks all at once.
mIRC - mIRC: Internet Relay Chat client
WeeChat - WeeChat is a fast, light and extensible chat client.
Kiwi IRC - A hand-crafted IRC client that you can enjoy. Designed to be used easily and freely.
IRCCloud - IRCCloud is a modern IRC client that keeps you connected, with none of the baggage. Stay synced and notified wherever you are with our web and mobile apps.