CRM (Customer Relationship Management) refers to assortment of practices, policies and technologies that companies use to handle and review interaction with current and potential customers; with the major aim of boosting business relationships with customers, customer retention and driving sales growth.
SuiteCRM is a free and open source, fully-featured and highly-extensible CRM system that runs on any operating system with PHP installed. It is a fork of the well known open source SugarCRM Community Edition.