A Forth compiler with a little difference
Scientific/engineering firmware repurposing HP business calculators!
RPNCalc - The command line Reverse Polish Notation (RPN) Calculator
An HP RPN calculator with interval output
ASCII SpaceInvaders, Pacman, Frogger, + 10 puzzles
Desktop RPN calculator
A suite of RPN calculators and a class library for Object Pascal
Terminal calculator with differential error estimates
End User Tools for Windows.
Fast Win32 math & science tool
Simple Java computer algebra calculator
financial, statistics, scientific and programmers calculator
Simple RPN desktop calculator, implemented with wxWidgets and Lua.
ultimative units calculation and conversion tool and library
Astronomical Database
Rpn calculator, string and macro based
Reor is a winsome calculator with loads of functions, by Ajay Menon.
A complete Arduino library for the Fluxamasynth shield.
An RPN command line calculator.
galculator is a scientific calculator in algebraic mode and RPN
Conversion of arithmetic expressions from infix- to postfix-notation.