TexitEasy - TexitEasy is a free, cross-platform and open-source latex editor.
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…
latex4technics - Online LaTeX editor with autocompletion, highlighting and 400 math symbols.
Equation Illustrator V - Technical graphic tool for Windows to format and align formulae.
Lagrida Latexeditor - Lagrida Latexeditor is an all-in-one website that lets you edit, write or check the authentication of your mathematical equations or symbols in a decent manner without any hassle.
WIRIS editor - WIRIS editor is a visual editor (WYSIWYG) that allows inserting mathematical formulas in web pages.