TeX4ht is described as 'system for converting documents written in TeX/LaTeX/ConTeXt/etc. to HTML, various XML flavors, braille, etc., optionally using MathML' and is an app in the Development category. There are five alternatives to TeX4ht for Linux, Windows and Mac. The best alternative is TtM, which is free. Other great apps like TeX4ht are latex2rtf (Free, Open Source), latex2html (Free, Open Source), LaTeXML (Free) and Cassiopeia (Freemium).
latex2rtf is a translator program to convert LaTeX formatted text files into “rich text format” (RTF) files. RTF is a published standard format by Microsoft. This standard can be ambiguous in places, but RTF is supported by many text editors.
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.