Clearspace and Openfire
Clearspace is a team collaboration java based application that integrates IM, files, wiki and blogs. It is commercial, but has a free-to-use 5 user version. Openfire is a jabber/XMPP server which seems very powerful. It is open-source, but has a commercial version with additional features.
I’ve been planning to try out some Jabber servers once I get my new hardware in place. Openfire has a nice looking admin interface and seems to be well built. I might not have to look far. Clearspace might also compete with the Alfresco planning I’ve been doing.
From IT Redux.