Rock RMS - Rock RMS is a community supported open-source Church Management System that provides innovative features to churches of all sizes.
Cloze - Smarter Relationship Management
ChurchSuite - ChurchSuite is a cloud hosted, web-based church management system, ideal church database software for churches.
Propeller CRM - Small business CRM with deep Gmail integration
eCatholic - eCatholic provides a total content management system that helps Catholic parishes, ministries, & dioceses create websites & website design.
Streak - Manage customers inside Gmail