[Sametime](http://www-306.ibm.com/software/lotus/sametime/) was developed by

IBM as a business instant messenger that integrates with Lotus Notes and third

party software such as Microsoft Office. Though it is a closed protocol it

offers support for communications standards and standard protocols, including

Session Initiation Protocol (SIP), SIMPLE, T.120, XMPP, and H.323. One of the

features is IBM Lotus Sametime Gateway, which adds support for communication

with users of AOL, Yahoo, Google Talk and various XMPP based Jabber

communities.

* [Meanwhile - Reverse engineered](http://meanwhile.sourceforge.net/wiki/Meanwhile)

* [Wikipedia](http://en.wikipedia.org/wiki/IBM_Lotus_Sametime)

* [Sametime Homepage](http://www-306.ibm.com/software/lotus/sametime/)