OpenCart - A free shopping cart system. OpenCart is an open source PHP-based online e-commerce solution.s
Teachable - Create and sell beautiful online courses with the platform used by the best online entrepreneurs to sell $100m+ to over 4 million students worldwide.
Gumroad - An all-in-one solution to sell your work and grow your audience.
PowerSchool - PowerSchool provides a K-12 education technology platform for operations, classroom, student growth, and family engagement.
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.
Clever - syncing between education applications for K-12 schools