Open Source Dynamic form builder for HTML forms? [closed]

Question

I am looking for an Open Source Dynamic form builder something like http://www.jotform.me/ but free and Open Source and the End form must be in HTML no XHTML nothing else. Is their anything available ?

Answer 1

Edit: Thanks @Stefan Steiger
Better try: alpacajs.org which you can find on github: github.com/gitana/alpaca

Have you tried FormTools?
https://formtools.org/ try this link might be helpful.