IRCClient
HexChat
Chat with other people using Internet Relay Chat
KVIrc 4
Connect to Internet Relay Chat
LeechCraft
Modular Internet Client
Quassel IRC
Distributed IRC client with central core component
Quassel IRC (Client only)
Distributed IRC client with central core component
Weechat
Portable, Fast, Light and Extensible Chat Client
XChat
An IRC Client
XChat-GNOME
Chat with people using IRC