A free program for Android, by Chintan Radia.
Dont Touch My Droid is an application to help you to detect and alert when someone tries to touch your smartphone without your permission. It's very easy to use, and the best thing is that you don't need to install any additional hardware or software. You just need to download the app and install it on your smartphone. Once you are done installing it, you will be able to start using it. The app will help you to know what kind of people are trying to touch your phone, and it will help you to alert them. You will be able to set a sensitivity level to get a notification for each movement.
