A Korean company called Pen and Free launched a product that turns any laptop LCD into a touch screen. The product is called DUO. To use the DUO, you simply place a receiving station on your LCD and define the screen area. The stylus can then be used on your screen. The DUO support a maximum laptop screen size of  15.4 inches.

You can learn more about the DUO at the company’s website.

Via: Technabob