n8n-nodes-einvoice
n8n.io node to handle E-Invoices with PDF or XML Files (ZUGFeRD / XRechnung / Factur-X / EN-16931)
xrechnung-generator
A lightweight Node.js module for creating XRechnung-compliant invoices in the UBL (Universal Business Language) format.
easy-e-invoice
Easy invoice XRechnung is a standardized electronic invoice format developed to comply with the European Directive 2014/55/EU