"First, blogs moved from personal platforms to corporate tools.
Now, wouldn't it be great to put social networking to work in your
organization? Elgg is an open source application for creating
social networks. It can be customized with themes and extended with
plugins to work with other social networks or plug into an
organization's existing wiki and forum boards. It lets users
collaborate on projects within organizations or share notes within
"In addition to collaborative applications MediaWiki, Moodle,
and Drupal, Elgg works with the two most popular Virtual Learning
Environments (VLE), Blackboard and WebCT..."