Ubercart is an exciting open source e-commerce shopping cart that fully integrates your online store with Drupal, the leading open source content management system. 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 much more!
With Ubercart you can select to use Click & Pledge as your payment processor and take advantage of the Click & Pledge feature rich payment system and integration with Salesforce CRM.
Details about Ubercart may be found at the company's site @ http://www.ubercart.org/
For instructions to integrate Ubercart with Click & Pledge, see link to Click & Pledge manual: