* [CreditCardValidations v8.0.0](https://github.com/didww/credit_card_validations) – Ruby gem that validates credit card numbers, generates valid numbers, and performs Luhn checks.

* [moov-io/iso8583 v0.25.3](https://github.com/moov-io/iso8583) – Go package for reading, writing, packing, and unpacking ISO 8583 card transaction messages.

* [creditcard.js v3.0.52](https://github.com/ContaAzul/creditcard.js) – Simple JavaScript library for validating credit card numbers and details.