AffiliateWP - A powerful affiliate marketing solution for WordPress.
OpenCart - A free shopping cart system. OpenCart is an open source PHP-based online e-commerce solution.s
Promocate - Create and manage your affiliate program in minutes, Test your hypothesis, pick the winning result and drive more affiliate revenue.
Gumroad - An all-in-one solution to sell your work and grow your audience.
Echo - Golang HTTP server framework
Shopify - Shopify is a powerful ecommerce platform that includes everything you need to create an online store and sell online. Try it free for 14 days.