Overleaf - The online platform for scientific writing. Overleaf is free: start writing now with one click. No sign-up required. Great on your iPad.

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…

TeXworks - The TeXworks project is an effort to build a simple TeX front-end program (working environment)...

Math Magic - MathMagic Equation Editor for Desktop Publishing software & Word Processors, Adobe InDesign, QuarkXPress, MS Word, iWork, for Technical writing with very easy interface and fast input.

TeXstudio - TeXstudio is an integrated environment for writing LaTeX documents.

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