TillyPay - Recurring & single payment links, powered by Stripe.
Giftcard Zen - Buy a gift card at a discount
YouPay - The wishlist for everyone Life's too short for bad gifts. Share what you want, and let someone else pay, without sharing your personal details. Plus, it's absolutely FREE!
Wirize - Payment checkout for freelancers
PayRequest - SImple Fast Payment Links
Google Payment API - Enable an easy-to-use checkout experience for customers