OpenCart -The best FREE and open-source eCommerce platform
Everything you need to create, scale, and run your business
It is true that WordPress gives you higher leverage in Customization, but have you tried OpenCart?
OpenCart is specially tailored for e-commerce & online stores.
This gives online store owners high customization power to harness all marketing tools & thus boost income & sales.
To help you, here is a link to download 100 Open Cart Templates & Extensions to ensure you have a fully functioning e-commerce website.
100 OpenCart Premium Templates & Extensions