Hey, secristrc,
I personally use XChat. It's sort of a hackerish-looking program. To install it, run:
Code:
sudo apt-get install xchat
A lot of people use Pidgin, which is more beginner-friendly, but not as powerful (as far as IRC goes). It also supports many other protocols besides IRC. It comes with Ubuntu by default.
Then there's irssi. It is command-line, therefore not really beginner-friendly, but I must admit it's kinda cool. You can install it with:
Code:
sudo apt-get install irssi
There are many others, but those are the ones I'm familiar with.
I hope that helps!
-mac