Flocknote - Flocknote helps super duper churches with their members.
Jetpack - Jetpack offers SEO and security plugins for Wordpress.
Rock RMS - Rock RMS is a community supported open-source Church Management System that provides innovative features to churches of all sizes.
WP User Manager - The most customizable profiles, community builder and membership WordPress plugin
ChurchSuite - ChurchSuite is a cloud hosted, web-based church management system, ideal church database software for churches.
UpStream Plugin - UpStream Plugin is a free-to-use project management plugin that allows you to manage various types of projects right from your WordPress site.