Ecommerce

BigCommerce is an ecommerce platform ("Commerce built for momentum") supporting both B2C and B2B storefronts, marketplaces, and social commerce channels.

Ecwid is an ecommerce platform, branded "#1 Ecommerce Shopping Cart & Online Store," that lets merchants launch a store with no transaction fees and embed selling widgets into existing sites.

PrestaShop is an open-source, self-hostable ecommerce platform (with an optional managed-hosting option) that lets merchants build a fully customizable store.

Shopify is an all-in-one commerce platform that lets businesses build an online store, process payments, and sell across web, mobile, social, and in-person channels.

WooCommerce is an open-source ecommerce platform built as a WordPress plugin, described as "the most flexible ecommerce platform" giving merchants full control over their store.