OpenCart - A free shopping cart system. OpenCart is an open source PHP-based online e-commerce solution.s
Saleor Commerce - The world’s fastest-growing open-source e-commerce platform
Sellfy - Sellfy is an easy to use but powerful e-commerce platform where you can sell digital, print on demand or subscription products. Use a Sellfy storefront to create a beautiful online store or embed a Sellfy shopping cart to your own website.
Saleter - Transform your Instagram into an online store
Gumroad - An all-in-one solution to sell your work and grow your audience.
eCommerce Labels By ModeMagic - Create urgency, social proof & trust in your shopify stores