The Free / Libre / Open Source Web App with the most built-in features
RhinOS, CMS, Content Management System, Josep Sanz Campderrós
PEEL Shopping is an open source eCommerce CMS
Application for tracking customers, clients, accounts, etc. PHP/MDB2
100% OOP Next Gen CMS and Ecommerce Shopping Cart Solution
IBE/internet booking engine/webportal for tour operators/travel agents
TYPO3 6.2.3 with Twitter Bootstrap 3 in combination with Multishop 3.
A Virtual Table (Cart Table) for developers
Memebrship management solution for selling access and products
e-Commerce Tools for Pros such as a Blog Plugin for Zen-Cart
osCommerce based shopping cart script.