EspoCRM - EspoCRM is open source CRM (Customer Relationship Management) software that allows you to see, enter and evaluate all your company relationships regardless of the type.

Zoho CRM - Omnichannel CRM for Businesses of all sizes

CiviCRM - A Constituent relationship management for the Civic Sector

SugarCRM - SugarCRM enables businesses to create extraordinary customer relationships with the most innovative and affordable CRM solution in the market.

Less Annoying CRM - A simple customer relationship manager made just for small businesses. Manage contact info, track leads, and never miss a follow-up.

Capsule CRM - Online hosted CRM system for individuals, small businesses and sales teams wanting a simple, effective and affordable solution.