Content Management Software

Durpal
Drupal is a free software package that allows an individual or a community of users to easily publish, manage and organize a wide variety of content on a website. Tens of thousands of people and organizations are using Drupal. It can be used for Community web portals, Discussion sites, Corporate web sites, Intranet applications, Personal web sites or blogs, Aficionado sites, E-commerce applications, Resource directories, Social Networking sites
Licence: Freeware (GPL)
Size: MB
OS:
Download: http://drupal.org/project/drupal/
Documentation: http://drupal.org/handbooks