UberCart
Ubercart is an open source e-commerce solution fully integrated with the leading open source content management system, Drupal, winner in two categories of the Packt Publishing 2008 Open Source CMS Awards. This is a killer combination for anyone looking to build a community around a product, sell access to premium content, offer paid file downloads, and much more, all while maintaining a seamless connection to your users. Ubercart leverages the advantages of Drupal's major core and contributed systems, providing your users with shopping cart functionality that integrates with other parts of your company or community website
