Drupal is a highly modular, open-source Content Management System (CMS) that enables communities of users to easily publish, manage and organize a wide variety of content on their own websites. Tens of thousands of people and organizations are using Drupal to power community web portals, discussion sites, corporate web sites, intranet applications, and e-commerce applications.

High profile Drupal-based websites include:

Government:

Belgium, New Zealand, US www.recovery.gov

Education:

Harvard, Cornell, MIT, Sun Microsystems Learning Exchange