HexChat - HexChat is a fork of XChat with bug fixes and new features.
InspIRCd - InspIRCd Internet Relay Chat Daemon is a modular, high performance IRC daemon combining stability and a rich and extensive C++ API with optional features such as SSL and permanent channels.
irssi - Irssi is a terminal based IRC client for UNIX systems.
ngIRCd - ngIRCd is a free, portable and lightweight Internet Relay Chat server for small or private...
Kiwi IRC - A hand-crafted IRC client that you can enjoy. Designed to be used easily and freely.
ZNC - znc is an IRC proxy. It runs as a daemon and connects to IRC server, then allows you to connect...