Rock RMS - Rock RMS is a community supported open-source Church Management System that provides innovative features to churches of all sizes.

Zimplit CMS - The easiest Open Source Content Management System for small web- and minisites

eCatholic - eCatholic provides a total content management system that helps Catholic parishes, ministries, & dioceses create websites & website design.

BaferCMS - The fastest and the easiest way to edit content "in-place", while looking at the website.

ChurchInsight - ChurchInsight is a church website content management system (cms). It allows churches to have great church websites and the best church website designs.

Nibbleblog - Nibbleblog is a powerful engine for creating blogs, all you need is PHP to work.