Openfire is an open source instant messaging server running XMPP protocol (also known as Jabber). It is written completly in Java, which means it can run on any platform.
This guide describes the basic installation and configuration of Openfire 3.7 undex Debian Lenny OS.
Jabberd2 server is an application server based on XMPP protocol. This Guide describes the basic installation and configuration on Ubuntu 10.10 Maverick OS.