Last updated: 2013-12-16
Works with CiviCRM 4.6. It might not be supported anymore.
The Petition Email CiviCRM extension allows you to automatically trigger an email everytime someone signs a petition. The email can go to one or more static targets or you can do a dynamic lookup of targets by matching the value of a field in the petition signer's contact with a value in a target group's contact.
If combined with an extension that can do auto-lookups of electoral districts, such as the CiviCRM Cicero module (https://drupal.org/project/civicrm_cicero), you can use this extension for e-advocacy campaigns.