SugarCRM

SugarCRM is an open source customer relations management (CRM) application. Initially released in 2004, SugarCRM today powers operations for over one million businesses and organizations worldwide. SugarCRM has received the Best Open Source CRM Software award by the InfoWorld Bossie Awards program for the past five consecutive years.

SugarCRM is a premier customer relationship management application. Sugar Suite brings a new and effective way to better acquire, sell, service and manage customers, helping companies increase revenue by being more organized.

This is the free open source version of SugarCRM. More features are available in the commercial versions.

-SugarCRM developer