Club Right - Club & membership management software
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.
Sumac - Sumac Non-profit Software | Sumac non-profit software is an easy-to-use, affordable CRM solution that can be customized to meet the needs of any non-profit.
CiviCRM - A Constituent relationship management for the Civic Sector
PlumIQ - Fitness studio management software
Less Annoying CRM - A simple customer relationship manager made just for small businesses. Manage contact info, track leads, and never miss a follow-up.