fxSolver is an free online math solver, equation library, graphing calculator and science/engineering problem helper. To get started, add some formulas, fill in any input variables and press "Solve."

Mathematica is a technical computing system with a broad range of uses throughout various fields of discipline.

SpeedCrunch. SpeedCrunch is a high-precision scientific calculator featuring a fast, keyboard-driven user interface. It is free and open-source software, licensed under the GPL. Download Documentation Donate .

A high-level language and interactive environment for numerical computation, visualization, and programming

The built in Calculator on the iPhone.

Sage is a free open-source mathematics software system licensed under the GPL.

Get help and support for Windows —Windows 10, Windows 8.1, Windows 7, and Windows 10 Mobile.

SymPy is a Python library for symbolic computation.

RealCalc Scientific Calculator

Photomath is a mobile app that will give you the ability to test your equations through a simple calculator interface that will fully explain the solution in a step-by-step fashion. Read more about Photomath.

Free Step-By-Step Solutions to algebra problems.

Soulver is a software application that functions as a calculator that allows you type a continuous stream of information rather than having to input data into multiple cells.