I know how to build a e-commerce website based on core php or cakephp or codeigniter as php framework. I know all the basic features of a e-commerce. I even know how to develop it based on clients requirements.
osCommerce is another most popular open source web store management system for building web store to sell products. I know osCommerce Ins and Out Customization with Theming and Module development!
Zen Cart is another open source fee to use online store management system. It is PHP-based, using a MySQL database and HTML components. I know zen cart coding as well for Theming and Module development.
Magento is another most popular open source web store management system for building online store to sell products. I know Magento Customization with Theming, Skinning, Interface and Module development!