Seems to be primarily a database, but has great flexibility and incorporates a lot of collaboration features.
May work as a prospect database for some ministries. I'm exploring using it for client tracking for our local pregnancy help center.
I'd love to hear if anyone's already using it and how.
Christian Computing magazine (PDF) for October 2013 - Church Management System overview, Accordance 10, E-Sword, Volunteers, The City, Bible Study App by Olive Tree