* [taiwan-id-validator v2.1.0](https://github.com/enylin/taiwan-id-validator) – TypeScript library for validating common Taiwan identification and E-Invoice numbers, with checksum and format rules for National IDs, UI numbers, BAN, and related barcodes.

* [E-Invoice-EU @e-invoice-eu/server...](https://github.com/gflohr/e-invoice-eu) – Generate EN16931-compliant e-invoices (Factur-X/ZUGFeRD, UBL, CII, XRechnung) from spreadsheets or JSON.