opentaps is a Java Open Source ERP and CRM system with integrated Open Source business intelligence. It is designed to bring together all parts of your organization, so that you can work together more effectively and make better business decisions. Because opentaps is open source ERP & CRM, you can download, modify, use, and distributed for free.
This Free Open Source ERP & CRM Software offers e-commerce, point of sales, inventory, warehouse, manufacturing, customer service, and content management applications. It is written in Java, can be deployed on Linux/Unix and Windows, and is compatible with MySQL, PostgreSQL, Oracle, Microsoft SQL Server, and most other major relational databases.
Website: http://www.opentaps.org/