For one week only, the developer of CalculatorÂ³ has made their powerful calculator app free in the Windows Phone Store.
The app has just been upgraded to fully support Windows Phone 8 and includes Basic, Scientific, Programmer, Currency Converter, and Unit Converter. The app supports multiple Live tiles, so you can link directly to your favourite function and supports over 50 scientific and 125 mathematical functions.
Read more about the app and download it from the Windows Phone Store here.
Thanks Hisham for the tip.