C# Programmable Calculator

This one comes from Eric through the mailbag: http://www.personalmicrocosms.com/html/cspcalc.html “If you like Reverse Polish Notation (RPN) calculators and you like to program in C#, use C# Programmable Calculator to create custom functions using your favorite programming language. C# Programmable Calculator includes pre-programmed functions in the following categories: math, trigonometry, computer math, finance, and date and time manipulation….