Instant Messaging

Cryptocat allows you to set up secure and encrypted chat rooms.

Trillian combines messaging with Windows Live Messenger, AIM, Yahoo! Messenger, Google Talk, ICQ, Skype, MySpaceIM, IRC, Jabber; email with Hotmail, Gmail, AOL/AIM, IMAP, POP, and social networking with Facebook and Twitter.

Digsby combines messaging with AIM, MSN Messenger, Yahoo!, ICQ, Google Talk, Jabber, Facebook Chat; email with Hotmail, Gmail, AOL/AIM, IMAP, POP; and social networking with Facebook, Twitter, MySpace, and LinkedIn.

Meebo is one of the best online instant messaging clients. It allows you to sign in to Facebook, AIM, Yahoo!, MSN, GTalk, MySpace, ICQ, Jabber, and many more sites. Using one Meebo account, you can sign on all of the other accounts at once and manage them with one buddy list; all done through the web interface.

Yoono is a desktop application to combine Facebook, Twitter, MySpace, LinkedIn, AIM, MSN Messenger, Google Talk, Flickr, FriendFeed, and Yahoo! Chat.

Pidgin is an open source instant messaging and chat client that supports AIM, Google Talk, MySpaceIM, MSN Messenger, Yahoo!, IRC, ICQ, and many more.