CiviCRM - A Constituent relationship management for the Civic Sector
Flocknote - Flocknote helps super duper churches with their members.
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.
Rock RMS - Rock RMS is a community supported open-source Church Management System that provides innovative features to churches of all sizes.
Pipeliner CRM - Pipeliner CRM empowers small to medium-sized sales teams to close more deals and lower risk. Implementation and training are a breeze. Mac & Windows.
ChurchSuite - ChurchSuite is a cloud hosted, web-based church management system, ideal church database software for churches.