Free and Open Source Invoicing, Expenses & Time-Tracking
Free Desktop book-keeping software for small-businesses & freelancers
Simple and elegant invoicing solution
Empower your hosting business with FOSSBilling
Easy to use, modern and reliable POS solution.
Open Source Metering and Usage Based Billing API
Open-source pricing and billing infrastructure
Open Source Integrated Hospital Information Management System
Open Source Openbravo POS convert to Commercial Retail ERP and POS
Linux-Based Billing And Business Application Server For FREE use.
Accounting system for smaller companies written in GnuCobol.
Simple Invoicing program for Desktop written in vba and Access
An Invoicing program for Auto Shops written in vba and MS-Access.
QRK Registrierkassen Software für kleine Betriebe.
A simple phone billing console-based app (C language)
Reverse engineering API
Creates Invoice & Quotation for Customers
A basic PHP/MySQL/HTML Billing APP. Meant for developers learning.
Display earnings in real time and log work to Excel
Calculate your budget without spending much for your home and business