An XMPP server.
jabberd 2.x series is the next generation of the Jabber/XMPP server.
It has been rewritten from the ground up to be scalable, architecturally sound and to support the latest protocol extensions coming out of the XSF.
Note that jabberd2 is NOT a new version of jabberd14. It's a different project with distinct codebase and features.
These details are provided for information only. No information here is legal advice and should not be used as such.