vbDrupal is the fork project of the Drupal content management system. It integrates Drupal into the forum software vBulletin.

With vbDrupal, Drupal and vBulletin are interwoven together, with no changes to the vBulletin forum, and minimal changes to the Drupal core. vbDrupal offers the best of both worlds, a great forum and superb content/portal management. vbDrupal also comes with add-on modules that allow node creation from vBulletin threads, the ability to create recent post and vBulletin calendar blocks, as well as using vBulletin threads for commenting in Drupal.

vbDrupal is completely free, however it does require that you have a valid vBulletin license. The project is hosted on SourceForge.net, from there you can download the product and/or it's sources as well as vbdrupal.org.

Currently, supports Drupal 4.6.x and 4.7.x, with development for 5.0 in process. Supports both vBulletin 3.5.x and 3.6.x.