Trillian - http://www.trillian.cc/

Free all-in-one chat client with native support for mIRC, MSN Messenger, Yahoo Messenger, ICQ, and AIM. It features many plugins to extend support including Jabber, Novell GroupWise Messenger, and Rendevous, however the Pro version is required for those extended services. Most of the other plugins can be used with the free Basic version.


Buildings & structural reference sites - http://www.coniserver.net/ubbthreads/showflat.php?Cat=0&Number=540402


The Gamedev program list link is corrupt. Here's the corrected version until the next update is uploaded - http://www.gamedev.net/community/forums/topic.asp?topic_id=324643