Hyper - Extensible, cross-platform terminal built on open web standards.
HexChat - HexChat is a fork of XChat with bug fixes and new features.
TermBar - Your terminal in your Mac menubar
irssi - Irssi is a terminal based IRC client for UNIX systems.
Windows Terminal - A new command line interface for Windows machines
Kiwi IRC - A hand-crafted IRC client that you can enjoy. Designed to be used easily and freely.