I've seen quite a few examples of XMPP clients in .Net, and I've seen quite a few servers in various languages, but I'm looking for a .Net version (opensource if possible) of a XMPP server. It doesn't particularly have to be stable, or full of features, I just want something that works a little. Reliability is not really an issue.
Here are some that I found:
EDIT: Note the comment below by the author of jabber-net, noting that jabber-net is not for writing servers:
As an alternative, take a look at this SO question:
or at these libraries:
that would allow you to create your own (if that is an option for you).