PadLock is a software that protects your iPad, iPhone or iPod when they are plugged to your computer.
So imagine that you are at work and you leave your iPhone charging with the USB cable, then this little software will trigger an alarm if someone disconnects your phone.
You can download it here.
This software reminds me a similar one that I use to have on my mac, so when someone removes the power cable, touches the mouse or keyboard or closes the laptop… o even if it is moved!, the software takes a photo sends it via email and triggers an alarm. This one was called iAlertU and you can download it here.
Both are free.