Working in academia publishing CS/math, you sooner or later find yourself trying to publish in a journal that will only accept .doc/.rtf. This means tedious, boring hours of translating line after line, especially equations, from LaTeX to an inferior format. Over the years I have tried a number of export tools for LaTeX, but none, at least of the free ones, that I have been very satisfied with. I'd like this page to collect and monitor the best import/export tools for LaTeX, to .doc/.rtf, or to other useful (e.g. HTML, MATHML) formats.
Thus, what is your one favorite import or export LaTeX tool?