Open-source ERP & CRM for small business — self-hosted, no user fees
Application to schedule appointments written in Java (Spring Boot)
Cross-plattform java invoicing and accounting application
Point of sale and custom accounting and billing for indian GST
A fully functional ERP suitable for institution of any size
A JavaFX based invoicing application for restaurants
The Open Source Invoice Management Software
jBilling is a web-based enterprise billing system.
Cyclos 3.7 port with improved UI and additional reporting app