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QuestPDF is a modern library for PDF document generation. Its fluent C# API lets you design complex layouts with clean, readable code. Create documents using a flexible, component-based approach.

  • pdf
  • nuget
  • c-sharp
  • dotnet-core

Open Source Metering and Usage Based Billing API ⭐️ Consumption tracking, Subscription management, Pricing iterations, Payment orchestration & Revenue analytics

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

  • php
  • expenses
  • javascript
  • invoices

Dolibarr ERP CRM is a modern software package to manage your company or foundation's activity (contacts, suppliers, invoices, orders, stocks, agenda, accounting, ...). it's an open source Web application (written in PHP) designed for businesses of any sizes, foundations and freelancers.

🎉 Flexible invoicing desktop app with beautiful & customizable templates.

  • invoice
  • invoice-pdf
  • invoice-generator
  • invoice-template

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

  • timetracker
  • timetracking
  • doctrine
  • twig

All in One PSA for MSPs, which Unifies client, contact, vendor, asset, license, domain, ssl certificate, password, documentation, file, network and location management with ticketing and billing capabilities, with a client portal on the side.

Declarative Java engine for structured documents. Automatic layout, pagination, reusable templates and themes. Render print-ready PDF, export editable PowerPoint, or generate semantic DOCX.

  • document-generation
  • java
  • layout-engine
  • pdf

MatchFlow is a full-stack invoice processing and purchase-order matching system—built on Clean Architecture with a React+Nginx front-end, a .NET 6 API back-end, Azure Form Recognizer OCR, Azure Blob Storage, and Docker Compose for one-command local setup.