vtiger CRM Integration for Zen Cart - Version 1.3.7 vtiger CRM Integration for Zen Cart will bring integrity to your business by keeping your inventory, customer and order information in your online stores and vtiger CRM synchronized.The vtiger CRM software is free Open Source CRM package specifically for small and medium businesses, created to enable organizations to better manage their customers through the introduction of reliable systems, processes and procedures for interacting with those customers.CRM system gives businesses many strategic advantages such as the ability to personalize relationships with customers regardless of individual employees .CRM helps businesses to close deals faster through rapid and more efficient responses to customer leads and customer information. The turnaround time has decreased drastically for organisations that have been able to implement CRM systems effectively.