Square Online Store - Build your own online store with Square
Experify - Connecting you to owners of products for honest opinions.
Swell.is - Customizable, API-first ecommerce platform for innovative brands, startups, and agencies.
Pattern by Etsy - Turn your Etsy shop into your own website
WooCommerce - A freely available eCommerce plugin that enables shop facilities on your WordPress website. Functionality enabling extensions & beautiful themes available.
Whatnot - The safest place to buy & sell collectibles