[Cosmo] a few open source groupware servers out there

[Brendan O'Connor]

I was looking around, and there seems to be several open source groupware  
servers out there...  (including 2 separate ones sponsored by Novell!)  I  
don't know how they relate to Cosmo, or how they differ, but I thought it  
was interesting at least.

This post seems a good summary:
http://ubuntuforums.org/showpost.php?p=122259&postcount=13