
RPN
Very easy to use RPN CalculatorGPL-3.0-only

RPN
Reverse Polish Notation CalculatorGPL-3.0-or-later

RPNcalc
A simple, modern calculator that uses RPN (Reverse Polish Notation).GPL-3.0-only

Extended emulator of МК 61/54
Emulator of "Electronika МК 61/54" RPN programmable calculators.GPL-3.0-only

JRPN 16c
Programmer's calculator similar to an HP 16c.Apache-2.0