The Best CRM Suite

If is the poster child for SaaS cloud services, then SugarCRM is the poster child for successful open source software. It's important to remember that open source doesn't mean free software; it just means that the software's source code is available for download and customisation, if necessary. SugarCRM comes in a few different editions: Community (free), Professional, Corporate, Enterprise and Ultimate. It can either be rented as an on-demand application or installed on-premise.