luke irc client for linux

Anope is a set of IRC Services designed for flexibility and ease of use.

A cross-platform FTP client with graphical user interface.

IceChat Multi-Server, Scriptable, and fully customizable IRC Client

nIX FREE IRC Client For Windows

Ole is a free software that has great new features.

It allows people to make real music together via the Internet.

Quassel IRC is a modern, distributed IRC client based on the Qt4 framework.

Smuxi - irssi-inspired, flexible, user-friendly and cross-platform IRC client.

Combines F-Secure Linux Client Security and F-Secure Linux Server Security.

VooDoo cIRCle is well-scriptable IRC bot.