Customer Relationship Management, or CRM, is a business strategy to manage information about customers and clients. This information can later be used for up-selling, cross-selling and customer loyalty. CRM software solutions manage all aspects of customer relationship management, including contact information, customer tracking and profiling, direct mail and telemarketing management.
CiviCRM - Open Source CRM Software, Customer Relationship Management
Compiere - Open Source CRM Software, Customer Relationship Management
openCRX - Open Source CRM Software, Customer Relationship Management
SugarCRM - Open Source CRM Software, Customer Relationship Management
vtiger - Open Source CRM Software, Customer Relationship Management