vatlayer API - Free VAT Validation & EU VAT Rates API
VatStack - Simplify VAT & GST for your digital business.
MFLicenseCenter.com - Connect to fuel tax licenses for tax determination, return preparation, and reporting compliance.
vat-search.eu - VAT (Value Added Tax) ID - Numbers Search Lookup
TaxJar - TaxJar simplifies sales tax filing for eCommerce sellers.
TeamLogger - Simple, employee time-tracking software with automatic screenshots and activity level monitoring. $1 / User / Month.