Free for your iPhone that changes your iPhone to an input device
You can now use your iPhone or iPod touch as a trackpad for your computer or laptop. Behold, it’s another cool application by Logitech that’s making this magical transition possible. You can also use your Apple touch-sensitive device as a keyboard, wirelessly! The application works over Wi-fi, thus giving you control on your devices even from a distance. The best part is that this application is free of charge. You can download it from here.