Best so far, but could beat all forever!

I have been looking for a good OSX IRC client for the Mac. Pretty much everything I found is no longer supported, with support ending around 2006. I like X-chat, but only being able to run it via X kinda stinks. This app looks like the cleanest of all the ones I looked at, both in and out of the Mac App Store. Its really clean and modern, yet still has that console style. It did however crash when I tried to join a server where the username was already taken. But with support, and updates, I feel this app has great potential.

Joseph Sobberi about Mango IRC - Chat client