Become.com is a price-comparison shopping site and distributed content commerce service. The company provides information on a wide range of products. It serves as the data source for numerous other shopping websites.
Please find more information about how to install plugins here.
The plugin is provided absolutely for free and includes source code. Find the project Github repository here.
UPDATE: nopCommerce team doesn't plan to upgrade this plugin to the latest version. Our community is more than welcome to continue development of the plugin. Please feel free to use our source code.