The Vtiger CRM is an open source, Web-based CRM (customer relationship management) for each type of business that was created by 2003 from a group of developers in Bangalore, India.
Although available for free, Vtiger is a corporate-level toolkit for managing a company's online business, full of features where everyone with the right credentials can use it.
The team that developed it focused on improving how to manage online businesses.
It can be used to manage employees, tasks, projects, workflow, contracts, services, products, contacts, organizations, complaints, suppliers, manufacturers and much more.
You can download Vtiger CRM here.