01-08-2014, 05:39
PhpFreeChat. It's free and open source! 
The older 1.x is more fully featured, but the newer 2.x looks better. I haven't used it in a while, but I had it setup on my site for a bit just for kicks.
Home Page: http://www.phpfreechat.net/
Demo For 2.0: http://www.phpfreechat.net/demo
Demo For 1.0: http://www.phpfreechat.net/src/1.0/
The older 1.x is more fully featured, but the newer 2.x looks better. I haven't used it in a while, but I had it setup on my site for a bit just for kicks.Home Page: http://www.phpfreechat.net/
Demo For 2.0: http://www.phpfreechat.net/demo
Demo For 1.0: http://www.phpfreechat.net/src/1.0/