SmartPOS (Includes->SmartERP distro of Idempiere ERP) is 100% Web
JEE based Accounting web-application.
Create and print simple invoices
Human Capital Management system
A JavaFX based invoicing application for restaurants
The Open Source Invoice Management Software
JavaPOS implementation and more, for Brazilian Retail applications
Shipping biller is benificial tool for generating shipping bills.
Printed document formatting like invoices, payment instruments, etc.
invoice system
Alternative Gnucash implementation