CiviCRM is free, open source constituent relationship management software that handles member management including renewal reminders, online contributions, online event registration, mass mailing and can be used to track all of your organizations interactions with your constituents. Best of all it completely integrates with your Drupal website. After an overview of what it is and what it can do, we'll either look at some case studies, add-on modules or at customization through the api depending on participant interest.