If you're looking for a shopping cart plugin for WordPress, WooCommerce is one of the most popular ones out there. And best of all, it's completely free.
We've built in compatibility and enhancements for your theme, specifically for WooCommerce. Upon installing WooCommerce, you'll see an extra set of options added to your theme options page at Appearance > Theme Options > Plugins > WooCommerce. Additionally, you'll see a lot of custom styling and variations in the ways products are displayed on your site, outside of the default WooCommerce experience.