Are you a priest, or a pastor, do you have trouble with your meetings, the holy mass is a mess? For you, my son, there is Worship-Leader a specialized application for Priests and Pastors who want to keep their sheep flock on track and singing in the right key. The interface is confusing, the usability could be better and the colors chosen used green/pink (white and gold would have been nice, or black with little white accents). Oh, just download it and enjoy. Available for Mac-os9.