Alongside the meteoric WordPress by Automatic, their e-commerce plugin WooCommerce enables millions of sites to sell to the public at large.

Integrating with many payment vendors, and rivalling other commercial online store systems for features, WooCommerce allows a WordPress site to take full control of their store experience.

I've implemented many WooCommerce stores for clients and businesses to great effect, and it is rare that WooCommerce can not rise to meet business demands due to its extendable nature and wider ecosystem integrations.