LATEX iT

\pi^2 =&6\sum_{i=0}^{\infty}\frac{1}{i^2}\\
\pi^4 =&90\sum_{j=0}^{\infty}\frac{1}{j^4}\\
\pi^6 =&960\sum_{k=0}^{\infty}\frac{1}{k^6}

This small app from Pierre Chatelier allows you to create JPG and PDF images for inclusion in your web pages, easily from L^AT_EX math. Here you see a jpg — click the image to see the pdf.

When you generate a pdf file, L^AT_EX iT embeds the L^AT_EX source in the pdf, so that,later, you can paste the pdf back into this application, and edit the source. Brilliant!