Find my iPhone, a free software for iPhone, iPod touch and iPad which originally only worked if you had a paid MobileMe subscription, now works without any such subscription. This app allows you to find your iDevice no matter where it is by locating it on a map, Making it ring, sending a message to it incase someone else has possession of it by accident. All in one free app by apple, obviously.
- Shiv ( http://www.controlyourmac.com )