Drupal is an Open Source CMS that can be used to build a variety of websites ranging from personal weblogs to large community-driven websites. The Drupal plugin for Mollom is maintained by the Mollom team. Development happens in the open on the Mollom drupal.org project pages. A tutorial for the Drupal plugin is available.
Download:http://ftp.drupal.org/files/projects/mollom-6.x-1.9.tar.gz