WooCommerce

WooCommerce is an open-source ecommerce platform built on WordPress. Installed as a plugin, it turns any WordPress site into an online store that you fully own, giving you control of your checkout, your data, and your costs rather than tying the business to a closed, hosted platform.

Merchants get a complete commerce toolkit: a product catalog with physical and digital goods, cart and checkout, order and customer management, configurable shipping and tax, and your choice of payment providers. Stores can sell online and offline, locally or globally, and a mobile app handles management on the go.

WooCommerce is deeply extensible. Thousands of extensions, themes, and a developer API let you adapt the store to almost any requirement, from simple shops to large enterprise commerce. It is built by Automattic with a broad community of contributors and powers a large share of the world's online stores.