Zipsell - A free, open source platform for selling digital downloads
Checkout Page - Sell on your site with customizable checkouts. Tailor-made one page checkouts to sell digital products & services without an ecommerce store.
Ko-fi - Ko-fi offers a friendly way for content creators to get paid for their work.
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.
SuperPay - Get paid faster with your own custom payments page
Stripe Elements - Beautiful, smart checkout flows 💳💸