Live markdown editor based on MathJax and Marked
text → Escape tags → MathJax → Markdown → preview
http://kerzol.github.io/markdown-mathjax/editor.html
You should initialize and fetch marked into lib/. Just type in the terminal:
cd markdown-mathjax/
git submodule init
git submodule update
We use MathJax from http://cdn.mathjax.org/. If you don't like that you need to read and modify editor.html