Free Desktop book-keeping software for small-businesses & freelancers
Free and Open Source Invoicing, Expenses & Time-Tracking
Simple and elegant invoicing solution
Empower your hosting business with FOSSBilling
Open Source Metering and Usage Based Billing API
Open-source pricing and billing infrastructure
Easy to use, modern and reliable POS solution.
Open Source Openbravo POS convert to Commercial Retail ERP and POS
Accounting, invoicing, inventory and payroll software for Linux
Τιμολόγιο δαπάνης Ενόπλων Δυνάμεων
Accounting system for smaller companies written in GnuCobol.
Simple Invoicing program for Desktop written in vba and Access
Open Source Integrated Hospital Information Management System
An Invoicing program for Auto Shops written in vba and MS-Access.
A simple phone billing console-based app (C language)
Reverse engineering API
Linux-Based Billing And Business Application Server For FREE use.
QRK Registrierkassen Software für kleine Betriebe.
Creates Invoice & Quotation for Customers
A basic PHP/MySQL/HTML Billing APP. Meant for developers learning.