vatlayer API - Free VAT Validation & EU VAT Rates API
Amazon Pay - Amazon Pay is an online payment service that makes checkout on your site fast and secure for hundreds of millions of Amazon customers around the world.
MFLicenseCenter.com - Connect to fuel tax licenses for tax determination, return preparation, and reporting compliance.
BlueSnap - BlueSnap is a global payment service provider powering the checkout process for eCommerce merchants...
TaxJar - TaxJar simplifies sales tax filing for eCommerce sellers.
Chargent - Chargent is a Salesforce native credit card / ACH payment solution for one-time or recurring billing.