It looks like Leo Privacy Guard just came out with a new version of the software. Several new features that I'm loving so far. One of the most useful things I've found is the ability to track your lost phone. It's come in really handy when loosing it and having my phone on silent.
I also like the snooper-selfie ability. It basically takes a photo when it senses a security breech. This way you have a photos of whoever snoops in your phone. Pretty awesome I think!