Recently I spent some time porting Termcat from Clojure to ClojureScript. As a result, it is now possible to embed the Termcat compiler in web pages.
I also went one step further and created a live demo. The demo consists of a simple Termcat editor. As you enter Termcat code, it compiles your document to HTML/MathML on the fly.
Do try the demo if you're interested in alternatives for LaTeX or Markdown!