A list of good XMPP servers

I have decided I want to maintain a list of good, free XMPP servers. Primarily as a way of steering people away from Google.  Additionally, assuming the owners of these servers are ok, I’m thinking of including registration links in app.  I think a lot of people — including myself used google talk because it was convenient.  I actually wasn’t sure what server to switch to. I imagine this is even worse for someone new to XMPP. I know many people like to run their own servers, this is intended for everyone else.

To get the list started, servers that I know of. Please let me know if there are others that you recommend. There is also a  more exhaustive list but I am tying to keep this limited to larger, updated servers with carbons, stream resumption and push support and open registration.

https://jabber.hot-chilli.net  ( the server I am currently using)