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.
You can also find the project Github repository here for previous versions.
Note: This plugin was originally developed by nopCommerce team. And now it's upgraded and maintained by nopStation.