┬   ┌┬┐ ┬─┐ ┬─┐ ┬─┐ ┌┐┐ ┬─┐
│    │  │─│ │─  │┬┘  │  │─┤
┘─┘ └┴┘ │─┘ ┴─┘ │└┘  ┘  ┘ │

┌─┐ ┬─┐ ┐─┐ ┬─┐
│   │─┤ └─┐ │─┤
└─┘ ┘ │ ──┘ ┘ │


What's XMPP

Overview:  XMPP is the Extensible Messaging and Presence Protocol, a set of open technologies for instant messaging, presence, multi-party chat, voice and video calls, collaboration, lightweight middleware, content syndication, and generalized routing of XML data.

FAQs

There are quite a few clients available.
You can register using a "name"
JID: name@liberta.casa

and the password of your choice.

Host: xmpp.liberta.casa
Port: 5222