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.
WildApricot - WildApricot is a powerful cloud software to help you automate and simplify membership tasks.
CiviCRM - A Constituent relationship management for the Civic Sector
YourMembership - YourMembership provides membership management software integrated with social networking features.
Less Annoying CRM - A simple customer relationship manager made just for small businesses. Manage contact info, track leads, and never miss a follow-up.
Kajabi - Kajabi is the only Knowledge Commerce platform today with everything you need to market, sell, and deliver your knowledge online.