"If you are looking for church software to manage an entire community of churches, then IconCMO+ Multisite Church Software is the church management solution for you!"
Church web-based management software- has some interesting process cues to help track visitors and tasks to keep them connected as well as other management info
Christian Computing magazine (PDF) for October 2013 - Church Management System overview, Accordance 10, E-Sword, Volunteers, The City, Bible Study App by Olive Tree