An easy to use, powerful, and flexible framework for building prototypes and production code on any kind of device.
Foundation includes dozens of styles and elements to help you quickly put together clickable prototypes, that can then be adapted and styled into polished production code. Forms, buttons, tabs, all kinds of good stuff.
For some reason they’ve made it look like a commercial offering, but it seems to be free and MIT licensed.
Time to find an idea to test this out with.