Of course XMPP doesn't count... even though it's a standard, allows people to run their own server, have an email-like address of user@server, allows you to com

Of course XMPP doesn't count... even though it's a standard, allows people to run their own server, have an email-like address of user@server, allows you to communicate from anywhere, and is how I, my family, and many many others chat online? :)