Open QuarterMaster

Open QuarterMaster is a self-hosted enterprise resource planning tool built for small businesses that need to track inventory, manage orders, and automate billing without paying for expensive SaaS subscriptions. It handles stock levels, purchase orders, and customer records in one place. The system includes a built-in billing engine that can generate invoices and process payments automatically when orders are fulfilled.

The software runs on Linux and uses a PostgreSQL database for storage. It offers a REST API for integrating with e-commerce platforms like WooCommerce and Shopify. Open QuarterMaster also supports barcode scanning for inventory management and provides basic reporting on sales trends and stock movement. The project is written in Java and uses Spring Boot for the backend.

This tool is best suited for small manufacturers, retailers, or makers who want full control over their business data. It is released under the GNU General Public License v3.0 by Epic Breakfast Productions. The project is actively developed on GitHub with a growing community of contributors.