CiviCRM is maintained outside of the Drupal repository under an Affero General Public License (AGPL). 
The Drupal CiviCRM module is available under the GPL and also available here. 
For it to work you will need to download the entire CiviCRM distribution from http://www.openngo.org/.
For more information visit http://www.openngo.org/

CiviCRM maintains a external issue tracker at http://objectledge.org/jira/browse/CRM