Elgg empowers individuals, groups and institutions to create their own fully-featured social environment.
Elgg, started in 2004, is an open source social engine which powers all kinds of social environments - from education and business to martial arts and rugby. If you are looking for a professional social intranet or want to run a site for your organisation, Elgg is a great choice.
Elgg is free, open, and available to anyone under the GNU/GPL license.
||Free to try
Windows Server 2008
||Any Virtualization software: VMWare, VirtualBox, Parallels