Compiere ERP+CRM is the leading open source ERP solution for Distribution, Retail, Manufacturing and Service industries. Compiere automates accounting, supply chain, inventory and sales orders. Compiere ERP is distributed under GPL V2 by Compiere, Inc.
This is a Java Business Accounting API that consist of invoicing, general ledger, stock/inventory control and other business API that will assist java developer to build a business software with ease.