Stripe - Online payment processing for internet businesses. Stripe is a suite of payment APIs that powers commerce for online businesses of all sizes. Use Stripe’s payment platform to accept and process payments online for easy-to-use commerce solutions.
Alcamy - Free, open self-learning platform. Learn & teach anything.
Wirize - Payment checkout for freelancers
Stacks - A bookshelf for your online courses
Giftbit Payment API - Stripe for gift cards
Airschool - Airschool is a live-streaming educational platform with engagement and monetization tools to help anyone start teaching online. It can be finance, business, wellness, meditation, branding, marketing; in short, anything you want!