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…

LaTeXML - In brief, latexml is a program, written in Perl, that attempts to faithfully mimic TeX’s behaviour...

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.

latex2html - latex2html is a convertor written in Perl that converts LATEX documents to HTML. This way e.g.

Visual Math Editor - LaTeX, AsciiMath and MathML editor developed in Javascript and HTML

tex2mail - tex2mail – Converts TeX to mailable "ASCII art"