Ratchet is a free and open source tool. Its main function is to use the simplest HTML, CSS, JavaScript and other web technologies to easily create iPhone application prototypes.
Ratchet is very simple to use. It only takes a few simple lines of code to create most of the iOS components, such as: Bars, Lists, Buttons, Segmented controllers, Counts, Forms, Toggles, Popovers, Sliders, Push, etc.
And Ratchet has good documentation, and the author said that more new features will be developed in the future to make it easier for mobile app developers to create iPhone App prototypes. For detailed demonstration and download, please click on Ratchet's official website for