Openpay - Openpay is a payment gateway solution.
The Product Management guide - A book on how to create and ship products that people love
Deferit - Deferit is a billing and budgeting platform that allows you to pay bills in fortnightly installments and make your budget go the extra distance needed.
Product School - The global leader in product management training
I2c - I2c is an open API card issuing, payment processing, and digital banking platform that allows you to create payment card programs and have flexibility in billing options.
Product Management Exercises - A repository of product manager job interview exercises