Giftbit Payment API - Stripe for gift cards
Felt for iPhone - Handwritten cards for the modern world
Wirize - Payment checkout for freelancers
MidMod - Curated mid-century modern design for your home.
Payant for Messenger - Pay + get paid anywhere, including messaging apps
Handwrytten - Handwritten notes straight from your device. Huge selection of cards or design your own. Handwriting service integrates with 1000's of apps.