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.
CiviCRM - A Constituent relationship management for the Civic Sector
eCatholic - eCatholic provides a total content management system that helps Catholic parishes, ministries, & dioceses create websites & website design.
Less Annoying CRM - A simple customer relationship manager made just for small businesses. Manage contact info, track leads, and never miss a follow-up.
ChurchInsight - ChurchInsight is a church website content management system (cms). It allows churches to have great church websites and the best church website designs.