CiviCRM - A Constituent relationship management for the Civic Sector
ChurchSuite - ChurchSuite is a cloud hosted, web-based church management system, ideal church database software for churches.
Odoo CRM - Open Source CRM
eCatholic - eCatholic provides a total content management system that helps Catholic parishes, ministries, & dioceses create websites & website design.
WORKetc CRM - All-in-one business management system. CRM + Social + Projects + Billing
ChurchInsight - ChurchInsight is a church website content management system (cms). It allows churches to have great church websites and the best church website designs.