Epihub - Shopify for tutoring, training, and online schools
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.
Traverse - Barcoding solution for small to midsize businesses
SuperPay - Get paid faster with your own custom payments page
DIY Air Purifier - Build your own air purifier for under $100
PayPal - PayPal is the faster, safer way to pay online without sharing financial details, send and receive money or accept credit and debit cards as a seller