iToolkit is a set of useful tools with great interface design for your iOS device. It's now include a Calculator, a Flashlight using iPhone 4's back LED light, a Night Clock and a Unit Converter.

iToolkit Features:

- Full animated user interface.
- A good looking Calculator with sound feedback.
- A flashlight with vibrate and sound feedback. (iPhone 4 required.)
- A fine design night clock.
- A handy converter include 5 types unit conversion.
*Distance (CM, M, KM, Foot, Inch, Yard, Mile)
*Weight (mg, g, kg, t, oz, lb, dr)
*Energy (J, kJ, BTU, Cal, cal, kWh)
*Speed (KM/h, M/s, mph, knot)
*Temperature (Celsius, Fahrenheit, Kelvin)

More features will coming if you like iToolkit.