About two years ago I first mentioned the Keynotopia templates for creating interactive iPhone and iPad app prototypes using Keynote.
Since that time Keynotopia has grown and come out with a number of premium products.
Recently Keynotopia released a set of vector components in a hand drawn style (over 1,000 in the set) for free.
Here’s a video demonstrating how to go from the free components to a real prototype in a few minutes:
You can get the components here.
You will need to tweet to download the components, but it’s well worth it considering the size and the quality.