Open Atrium

Open Atrium is an intranet in a box that has group spaces to allow different teams to have their own conversations. It comes with six features - a blog, a wiki, a calendar, a to do list, a shoutbox, and a dashboard to manage it all. What makes it unique is that it's extensible and customizable. This means that you - and everyone - can develop new features for it, add other modules, change the skin, totally re-factor the workflow, and do anything else that you can think up to make Open Atrium meet your exact needs.

• Details - http://openatrium.com/
• Project - http://drupal.org/project/openatrium
• Community - https://community.openatrium.com/
• Discussion (groups.drupal.org) - http://groups.drupal.org/open-atrium
• Demo - http://openatrium.demo.drupalkata.org/