Twisted Words is the Chat and Instant Messaging portion of the Twisted
system. It is both a multiprotocol instant messaging client and server
and provides low-level protocol implementations of OSCAR (AIM and ICQ), 
IRC, MSN, TOC (AIM) as well as Jabber libraries. 

Twisted Words is available under the MIT Free Software licence.

WWW: http://twistedmatrix.com/