#invoice

Kimai is the #1 open-source time-tracking application. From freelancers to companies and organisations - everyone can manage timesheets, generate reports, create invoices and so much more... Web-based multi-user application, available as On-Premise or SaaS version: https://www.kimai.org

Render OG images and paged PDFs from JSX, HTML, and CSS. No headless browser. Runs on Node.js, Cloudflare Workers, browsers, and Rust.

A source-available invoice, quote, project and time-tracking app built with Laravel

SDK para los Web Services de AFIP

Mindee API Helper Library for .NET ecosystem

💸 Fast, efficient CLI with MCP support for invoice & time tracking

Pure Rust PDF library for AI/RAG: structure-aware chunking, no ML, no C deps.

ZUGFeRD/XRechnung/Factur-X Library

SDK oficial da NFE.io para Node.js (TypeScript, zero dependências) para emitir NFS-e — nota fiscal de serviço eletrônica — e consultar CNPJ e CEP via API. Documentos fiscais do Brasil com async/await nativo.

Go SDK for integration with the Integrated Tax Administration System (SIAT).

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

Open source C# e-invoicing library. Enables creating and reading ZUGFeRD invoices.

A .NET typesafe implementation of Stripe's Invoice Items API

A .NET typesafe implementation of Stripe's Subscription Items API