invoice

电子发票识别，可识别 电子普票 电子专票

Java library for Swiss QR bill payment slips (aka QR-Rechnung)

Java library for reading and writing UBL 2.0, 2.1, 2.2, 2.3, 2.4 and 2.5 documents

A Java client for the Sypht API

发票api，发票sdk，开票api，开票接口，发票接口，电子发票接口，电子发票api，数电发票接口，数电发票api，全电发票，数电票，支持java/php/go/python/nodejs/c#/rust等

A library to create, read and validate ZUGFeRD compliant invoices. Available for Java and .NET

An opensource invoicing engine

Converter for EN16931 invoices from CII to UBL

发票api，发票sdk，开票api，开票接口，发票接口，电子发票接口，电子发票api，数电发票接口，数电发票api，全电发票，数电票，java sdk

Java library for creating and sending XML files through SOAP - SUNAT

Xendit REST API Client for Java - Card, Virtual Account, Invoice, Disbursement, Recurring Payments, Payout, EWallet, Balance, Retail Outlets Services

OFD (open fixed layout document) is a Chinese Document Format, just like PDF. It is standardized as GB/T 33190-2016. ofdparser is a parser to parse the format according to the standard.

Uber Invoice Maker - Create uber like invoice by uploading a CSV file. (For Education Purpose Only)

Open-Source Billing And Rating Platform For Subscription

Moneybags: a cashflow management system

E-receipt a mobile app has following specs. You can create invoice of bill also you can send invoice to your target customer within single click. One copy of bill will be saved into your internal Storage . You can store customer's details for future transaction.

识别二维码，并将二维码转换为发票。支持数电票、增值税发票、特殊票种等

a library to convert numeric value to String of words in Vietnamese

pdfInvoice is an example implementation in iText 7 for the German ZUGFeRD 1.0 digital invoice standard.