A Free and Open Source eCRM Solution
CiviCRM is a free, libre and open source constituent relationship management solution. CiviCRM is web-based, internationalized, and designed specifically to meet the needs of advocacy, non-profit and non-governmental groups. See their vision https://civicrm.org/vision
CiviCRM is a powerful contact, fundraising and eCRM system that allows organizations to record and manage information about various constituents including volunteers, activists, donors, employees, clients, vendors, etc. Organizations are also able to track and execute donations, transactions, conversations, events or any type of correspondence with each constituent and store it all in one, easily accessible and manageable source.
CiviCRM is created by an open source community coordinated by CiviCRM LLC, and the 501(c)3 non-profit Social Source Foundation.