Froala builds editing software for fast development with the better developer and user experience in mind. With over 35+ plugins and 15+ natively supported frameworks, you can plug Froala and be on your way.
Pixelixe is a graphic design suite featuring a white-label graphic editor, design automation from spreadsheet to help you power your marketing projects.
TeX is the gold standard for typesetting of mathematical content. MathLive provides a JavaScript implementation that faithfully reproduces the output of TeX. MathLive supports over 800 TeX commands. (from the product's site)