Paper prototyping is a commonly used low cost usability method for testing and evaluating web designs and applications. This method lets developers conduct tests before a single line of code has been written, and allows you to identify and fix any potential issues early on in development.In this post we have collected our top 10 videos that not only illustrate how effective paper prototyping can be, they also show you how to cost effectively conduct your own tests and some of the videos have been animated, which are just amazing to view.