latex2htmlis the all around best tool for putting math on the web at the moment. It has its limitations, but it gets the job done.
You can download it at CTAN. We have a local version of the manual (1.2MB PostScript file) online as well.
latex2html can be installed on any system
with PERL. However, it also needs a number of supporting programs, to
function as well as possible. They include:
It is probably fair to say
latex2html is designed for and
used mostly on Unix systems.