Android/iOS: Getting robbed isn't at the top of anyone's to-do list, but if you have some way of proving what you own before a thief steals your stuff, it can make the recovery process a lot easier. Enter Encircle.
This app allows you to go room by room and take pictures of how everything is laid out as well as document the specific items of value, make notes, attach photographs, and even log receipts. Hopefully you'll never have to use the data in an app like this (and it should go without saying that you should keep the app itself protected in case you lose your phone) but in the event of an emergency, you might be glad you have photos to go along with your insurance claim.
Encircle | Google Play Store via Gizmo's Freeware
Encircle | iTunes App Store