[lqet]

What about htlatex? It is quite powerful. In most of the cases, it produces nice HTML pages out of the box, with automatic rendering of figures and mathematical equations into PNG. It is part of most LaTeX distributions. On Linux, for example, just type

  $ htlatex mydoc.tex

instead of

  $ pdflatex mydoc.tex

[michaelhoffman]

For me, at least, htlatex never works just quite right. There are a lot of edge cases where it's broken. If you want to preserve having non-PDF output, starting in something like Pandoc Markdown is a better idea. And I do most of my documents in regular LaTeX.