Extensible Messaging and Presence Protocol is a communications protocol based on XML for real-time exchanging structured data (text, voice, video, data) between network entities.
|Developed by||Jeremy Miller|
|Used by||Google, LiveJournal, Juick|
Unlike commercial instant messaging systems such as AIM, ICQ, WLM and Yahoo, XMPP is a federated, extensible and open system. Anyone can open their own instant messaging server, register users on it and interact with other XMPP servers.