Recurring Payments - No need to create invoices. No need to remind clients to pay
Giftcard Zen - Buy a gift card at a discount
Stripe Billing - A set of tools for billing and subscriptions
Wirize - Payment checkout for freelancers
PayHere - Run a services business or startup? Charge recurring and one-off payments with beautifully designed payment forms. Get up and running in less than 5 minutes!
Google Payment API - Enable an easy-to-use checkout experience for customers