Openfire is a known server for XMPP:
http://www.igniterealtime.org/projects/openfire/
Yes it is, and so is ejabberd, in GP's comment. (And the most popular iirc)
They were talking about indie game studies, not indie chat protocols.
Openfire is a known server for XMPP:
http://www.igniterealtime.org/projects/openfire/