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.
irssi - Irssi is a terminal based IRC client for UNIX systems.
HexChat - HexChat is a fork of XChat with bug fixes and new features.
LimeChat - LimeChat is an IRC client for Windows, Mac OS X and iOS. Features
mIRC - mIRC: Internet Relay Chat client
WeeChat - WeeChat is a fast, light and extensible chat client.