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…
CKEditor - Real-time collaborative future-ready rich text editor
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.
Edtr.io - Intuitive WYSIWYG web editor, open source & fully adaptable.
MathCast - MathCast is an equation editor, an application that allows you to input mathematical equations.
Summernote - Summernote is a JavaScript library that helps users create WYSIWYG editors online.