Where to get it?

So I looked through a few pages and I see people advertising their own servers but I don't see where I can download it myself to set up my own? Is the server code itself private? If not I'd like to know where to get it.

(Doing a google search is quite messy and I figured people here would know the best)



Thanks!

Found a Java based one, just waiting on the 9Gig client download and I'll test it out!