Free WordPress Plugin: This online calculator performs basic mathematical operations like addition, subtraction, division, and multiplication. You can use the calculator to find percentages and taxes. www.calculator.io/basic-calculator/

An extension to FoldingText to do math calculations.

A recode of C's printf variadic function. Handles flags, width, precision, length & specifiers provided by the format string

This Project is the Platform for the All in one Maths formula calculation, lots of tools are encapsulated in the same project

an app that allows you to do basic things via voice command like math calculations and mail sending.

This library makes using math calculations in Java easy.