Acquia Drupal is a freely available packaged distribution of the open source Drupal social publishing system. A collection of essential software from the Drupal community, Acquia Drupal provides a quick on-ramp to begin building Drupal websites.
Acquia Drupal simplifies the development of social publishing applications – social business websites that feature a seamless blend content and community capabilities. Whether building a public facing website, a community portal or an intranet application, Acquia Drupal provides the powerful foundation to engage visitors and encourage participation.
Acquia Drupal is free to download and use for any site
Acquia Drupal is GPL licensed and Acquia Drupal assembles together Drupal 6.x core with community contributed modules and Acquia modules to help you get started faster with Drupal.