Colloquy is an open-source IRC, SILC and ICB client for Mac OS X. It uses its own chat core that is also included as part of the ChatKit project, though in the past it used Irssi as its IRC protocol e... More
A while back, I extolled the virtues of open source IRC client Colloquy for the Mac. Now I'm happy to report there's an equally terrific counterpart for the iPhone. Colloquy for iPhone puts IRC functionality right on your Apple mobile device so you're no longer tied to your desk when you want to stay logged into your favorite IRC channels.
Colloquy for iPhone has many standard features you'd expect: Highlight and vibrating nick alerts, WHOIS information for any user, searchable room member list, and support for all common IRC commands. But wait, there's more.
In the age of Twitter and GoogleTalk, communicating via IRC seems to be going the way of the carrier pigeon. That's too bad because IRC channels -- the original version of modern day chat rooms -- are a great way for groups working remotely (and who isn't these days?) to stay in touch. If you're looking for a terrific open source IRC client for the Mac, you can't do better than Colloquy.