30 sites in Instant Messaging
Bantu
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Offers a web-based solution to instant messaging that lets you talk to people with the AOL, MSN, YAHOO, and ICQ messangers.
http://www.bantu.com/
P2P Messenger .NET
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A secure Instant Messaging client, working by Peer-to-Peer technology. It is fully decentralized and does not require any servers. Supports public-key cryptography. Requires installing .NET-Frameworks.
http://www.ufasoft.com/p2p/
Pidgin
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An instant messaging client, which can handle multiple protocols, including AIM, ICQ, IRC, MSN, Yahoo!, Jabber, and Gadu-Gadu. [Windows, Unix]
http://pidgin.im/
See also
The category Instant Messagingin other languages