XecuteIRC - For general discussion. Full channel and nickname services available. - http://www.xecuteirc.net/
twistedirc - Small IRC network offering general channels and full network services. - http://www.twistedirc.net/
ACKnet - Small server offering general discussion suitable for all ages. - http://www.acknet.org/
Houston-Texas.org - IRC server targeted at the Houston, Texas area, accessible via Java client or standard IRC client. Provides JavaScript to add chat rooms to other websites. - http://chat.houston-texas.org/
ChaoticRealm - Java server with optional IRC connection. Contains chat, trivia, FAQ, links, search feature. - http://www.chaoticrealm.com/
ChattersOnline.com - Small server accessed via Java client. - http://www.chattersonline.com/