Clank is an open source HTML/CSS prototyping framework for mobile apps. Think of it as Twitter Bootstrap but for prototyping native apps.
Run the demo files on a local webserver. Use the HTML and CSS components as you please.
Clank was inspired and uses parts of Ratchet.
Open a Github issue if you have any feedback or ideas.
Check out the "gh-pages" branch to contribute to the Clank project.