LateX to HTML
Stefan Ionescu has pointed out to me the following link : A Brief Description of LaTeXMathML (thanks!)
The abstract reads : "This is a short article that illustrates those aspects of LaTeX that are transformed by LaTeXMathML into a mathml plus html format. While limited in scope, LaTeXMathML nonetheless is capable of transforming a large subset of those elements found in a typical LaTeX article into a mathml empowered webpage. The goal of LaTeXMathML is that of making pure latex coding a "web-friendly" enterprise."