aRPNCalc is a complete yet simple RPN calculator (Reverse Polish Notation). It is a suitable solution to replace the Windows default calculator, so you can take advantage of the effectiveness and facility of the RPN notation.
For a best efficiency, all functions are accessible directly using the keyboard. It is never necessary to use the mouse, which is not very practical.
Lastly, RPN Calc enables you to modify the aspect of the interface by choosing among the available skins. You can also create your own skins. A glance on the .RSD files will enable you to understand how to proceed.
aRPNCalc Features:
1. All standard functions, a very simple and completely skinable interface and keyboard shortcuts for fast operation
2. A very efficient tool

The license of this software is Freeware, you can free download and free use this calculator software.