swagger.io - Swagger is an open source RESTapi Documentation Tool.
The QR Code Generator - Free Online QR Code Generator to make your own QR Codes. Supports Dynamic Codes, Tracking, Analytics, Free text, vCards and more.
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.
Uniqode - Uniqode: Revolutionizing QR Codes, Simplifying Solutions.
Stripe iOS SDK - Accept both Apple Pay and credit card payments easily on iOS
Offline QR Code Generator - A browser add-on that allows you to quickly generate a QR code offline with the URL of the open tab...