area calculator

Re-implementation of HP-42S calculator and HP-82240 printer.

Scientific calculator.

A linear regression calculator.

Matrix calculator.

Faithful simulation of the HP-67 calculator.

Graphing scientific calculator.

RPN calculator library for REALbasic.

Multi-precision RPN calculator.

SpeedCrunch is a fast, high precision and powerful desktop calculator.

PEMDAS is a Scientific calculator (was Formulas, was Equations).