This description comes from CiviCRM project page at Drupal.org:
CiviCRM is the first open source and freely downloadable constituent relationship management solution. CiviCRM is web-based, open source, internationalized, and designed specifically to meet the needs of advocacy, non-profit and non-governmental groups.
CiviCRM has a powerful contact, fundraising and eCRM system that allows you to record and manage information about your various constituents including volunteers, activists, donors, employees, clients, vendors, and more.
This powerful module can 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.
You should consider using CiviCRM if you need:
- You and your organization can be in full control of your own data and communications
- Store information about individuals, organizations and households and your interactions with them
- Store data in many localized formats and translated into a number of languages - including French, Spanish, German, Dutch, Portuguese and more
- Affordable and cost effective software
Visit CiviCRM homepage