fMath Editor -YUI Editor plugin is the best math editor to create and edit equations on web. It has more than 20000 symbols to display and a rich interface. The formula can edited by interface or in MathML or in LaTeX.

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fMath Formula - GWT Widget 1.5.1 fMath Formula - GWT Widget provide a simple way to display equations or mathematics formula on your GWT applications (Google Web Toolkit)

SciWriter 2.0.10.0 SciWriter is an XML based WYSIWYM word processor that completely integrates writing mathematics and text in the same environment