Jabber is an open, XML-based protocol for instant messaging and presence. Jabber-based software is deployed on thousands of servers across the internet and is used by over a million people worldwide. The protocol itself is managed by the Jabber Software Foundation.
(Source : http://www.jabber.org)
Some popular jabber clients :
- Exodus (Windows, GPL) : http://exodus.sf.net
- Jabber Instant Messenger (Windows, proprietary) : http://www.jabber.com
- Gabber (Linux/Unix, Gnome, GPL]) : http://gabber.sourceforge.net
- Psi (Crossplatform, GPL) : http://psi.affinix.com
Resources
- Jabber Software Foundation: http://www.jabber.org
- Jabber Central: http://www.jabbercentral.org/
- JabberView: http://www.jabberview.com