Cloze - Smarter Relationship Management
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.
Accompany - Accompany platform integrates with email, contacts, social feeds and more to keep you informed on your professional connections.
CiviCRM - A Constituent relationship management for the Civic Sector
SuiteFlow - SuiteFlow is a product to customer management solution offering a host of tools to manage inventory, contacts, invoices etc.
Less Annoying CRM - A simple customer relationship manager made just for small businesses. Manage contact info, track leads, and never miss a follow-up.