Scientific Wordprocessing Software for MacOS X, MathML based equation editor, LaTeX export

Cassiopeia is the most popular Mac alternative to TtM.
Cassiopeia is the most popular free alternative to TtM.
- Cassiopeia is Freemium and Proprietary
TtM is described as 'Translates from Plain TeX and LaTeX into HTML including the equations in the form of embedded MathML' and is a Code Editor in the development category. There are four alternatives to TtM for Windows, Linux and Mac. The best TtM alternative is Cassiopeia, which is free. Other great apps like TtM are TeX4ht, latex2html and LaTeXML.
Scientific Wordprocessing Software for MacOS X, MathML based equation editor, LaTeX export

Cassiopeia is the most popular Mac alternative to TtM.
Cassiopeia is the most popular free alternative to TtM.
TeX4ht is a system for converting documents written in TeX/LaTeX/ConTeXt/etc. to HTML, various XML flavors, braille, etc., optionally using MathML.
TeX4ht is the most popular Windows & Linux alternative to TtM.
TeX4ht is the most popular Open Source alternative to TtM.
latex2html is a convertor written in Perl that converts LATEX documents to HTML. This way e.g. scientific papers - primarily typeset for printing - can be put on the Web for online viewing.
In brief, latexml is a program, written in Perl, that attempts to faithfully mimic TeX’s behaviour, but produces XML instead of dvi. The document model of the target XML makes explicit the model implied by LaTeX.