Accounting system for smaller companies written in GnuCobol.
Open source ERP and CRM web software for business
Free Invoice & Billing Software for Windows, Linux & Mac
Accounting & Best Practice Business Administration System
uniCenta oPOS - dynamically evolving POS project
BestBooks Accounting Application Framework (BAAF)
Desktop and mobile solution for invoicing
Expense reporting system for business
Building High Quality ERP and Accounting Software for SMB & SME
Free PHP Codeigniter Expense Manager (management) Script
Baraza Business Management System, a product of Openbaraza
Mutasyon is a script can add customer, products, inventory or invoice
jBilling is a web-based enterprise billing system.
Web Based Multilingual Accounting Application