If you are looking for an app for Mac OS X that is great for video and slides, as well as audio, it’s time to give QLab a try.
QLab is an award-winning piece of software that you can use to create multimedia designs for live performances and installations. It gives you the control you need for audio, video and MIDI, from one place.
Best of all, the basic version of QLab is free. So, not only can you give QLab a run through some paces before jumping for a license, but you may find the free version meets all your needs. Plus, it makes a great resource for Churches!