Hmm... well I've just done a bit of searching for you on google.
I found this:
http://www.midgard-project.org/midgard/1.8/
Seen that one yet?
And I'll update this post with a few more if I find any... but that looks like what you need
EDIT:
I'm all out now, can't seem to be able to find any more...
Mambo looks like it might be able to do it, but while I've been using it I've never seen anything like that... Could always try it though:
http://www.mamboserver.com/
/ 
