Free and Open Source Invoicing, Expenses & Time-Tracking
Accounting system for smaller companies written in GnuCobol.
Accounting & Best Practice Business Administration System
Open source ERP and CRM web software for business
Accounting, invoicing, inventory and payroll software for Linux
Vintage Billing and Accounting Software for Small Business
JEE based Accounting web-application.
its complete accounting system for small scale manufacturing companies
Mutasyon is a script can add customer, products, inventory or invoice
An accounting / educational / MRP / ERP / CRM system for SMEs