Good WYSIWYG Math Expression Builder or WYSIWYG Plug in?

Question

Anyone know of a good Math Expression builder for an online WYSIWIG. Ideally the user would be able to easily create common math symbols/notations like summation, integrals, radicals, etc... online, ideally in an existing editor.

I also need to be able host it (and ideally integrate it) in a .NET stack (IIS/Windows).

Thanks in advance!

Answer 1

It's not quite a WYSIWYG editor, but if you haven't already, check out ASCIIMathML. IMO it does a good job of rendering mathematical equations from tex-like markup.

Answer 2

You may check the MathML editor by Connections which

(works at the moment only with Firefox)