Instant Bird is Multi Protocol Client supports of AIM aka AOL Instant Messenger, MSN Messenger aka Windows Live Messenger, YM aka Yahoo Messenger, GTalk aka Google Talk, Gadu gadu, ICQ, IRC, QQ, XMPP that works for Windows Platform, Mac OS X and also Linux.

Features available in InstantBird: Chat Room, Contact List, Tabbed IM Windows, and many more. It’s developed by Mozilla Teams that also create Mozilla FireFox, Thunderbird and more.
Download Page: InstantBird
License: Free / Open Source
Website: www.instantbird.com

Whizzper is Multi IM Client for mobile Phone. It supports: WLM, AIM, YM, and GTalk.

Multi-Community
Chat with MSN, AIM, Yahoo and Google Talk Buddies ANYWHERE!
Not only can you IM your Whizzper contacts, but you can also import all of your MSN, Yahoo!, AIM & Google Talk buddies by registering your accounts in the Settings area

Sorry friends, I can’t afford to run the service anymore and I don’t have time to maintain it.
If you would like to host the service and take full charge of it, please let me know. The traffic these days is pretty light

For some reason that said the author of the Soashable, it said, that the creator didn’t have much time to make maintenance to run soashable – social web base messenger (if you ever try to use it, it’s almost like meebo). Soashable is Open Source Project. Formerly you can …