Democratizing Innovation is the title of a book by Eric von Hippel. It describes how people participate in the development of products they use. For example, von Hippel in the fifth chapter uses the history of mountain biking to propound that users can also "be sophisticated developers". The MIT Press published the book in 2005. It is licensed under a Creative Commons license and is avaible as a downloadable PDF document on http://web.mit.edu/evhippel/www/democ.htm. Hippel (p. 2) summarized the book as follows.

In this book I explain in detail how the emerging process of user-centric, democratized innovation works. I also explain how innovation by users provides a very necessary complement to and feedstock for manufacturer innovation.