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.

SecuraCart - The easiest way to accept one-time and recurring payments.

Solo - Personal kanban boards hosted on your own server

Atom Pay - Atom is the easiest way to get paid for what you do.

Cash App - The easy way to send, spend, bank, and invest.

Payzo - Accept credit cards with zero coding (for freelancers)