ScratchQ

ScratchQ is a scratch pad for all of the "back-of-the-envelope" calculations that we do in everyday life.  Whether it is calculating the commission earned on a sale, the square footage of a room, or your grade point average, ScratchQ allows you to save an annotated version of the calculation that you can refer back to again and again.  A simple color-coded file system allows you to categorize your calculations.  ScratchQ comes with a custom keyboard that allows for easy editing of your saved calculations and easy access to the most common arithmetic operators.