HexChat - HexChat is a fork of XChat with bug fixes and new features.
EasyChannel - Simplify your multichannel eCommerce with EasyChannel.
irssi - Irssi is a terminal based IRC client for UNIX systems.
eDesk - Business Tools, Support, Sales, and Marketing, and Help Desk
Kiwi IRC - A hand-crafted IRC client that you can enjoy. Designed to be used easily and freely.
Zendesk - Zendesk is a beautiful, lightweight help-desk solution.