Introducing Catchlight, the most advanced programmable light source for the iPhone and iPod Touch.
Use your iPhone as a catchlight / eye light for film and video, or as a mini softbox for low-light still photography, all with complete control over color temperature. The interface is powerful and simple. Just drag with two fingers to adjust the color.
When you find a light color you like, hit the info button in the corner of the screen and type in a name to save it. Or, you can select from the 16 presets, which range from 2500°K to 10,000°K. For a round light source, just double-tap the screen.