WolframAlpha - WolframAlpha brings expert-level knowledge and capabilities to the broadest possible range of people—spanning all professions and education levels.

MathType - The Professional version of Equation Editor- MathType is a powerful interactive tool for Windows and Macintosh that lets you create mathematical notation for word processing, web pages, desktop publishing, presentations, and for TeX, LaTeX, and Math…

Photomath - 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.

LibreOffice - Math - Math, LibreOffice, math editor, ODF, OpenFormula, open standards

Cymath - Free Step-By-Step Solutions to algebra problems.

KLatexFormula - KLatexFormula is an easy-to-use graphical application for generating images (that you can drag and...