So, this one is my baby. I developed this site for a personal business several years ago with the help of my good friend Benji Smith. It is developed in PHP and is based on the open-source shopping cart application osCommerce. Benji did most of the look-and-feel, while I designed the t-shirts and did the custom programming.
Some of the custom programming elements were:
1) Integration with PayPal
2) Attribute-based weights
3) Hot products listing
In summary, this showcases PHP development, integration with open source, and graphic design.