Wikipedia
OpenXava is a web framework for developing business applications in an effective way. It not only allows rapid and easy development of CRUD modules and report generation, but also provides flexibility to develop complex real life business applications like accounting packages, customer relationship, invoicing, warehouse management, etc.
OpenXava allows developers to define applications with POJOs, JPA and Java 5 annotations.
Currently OpenXava generates Java web applications ( Java EE) which can be deployed in any Java Portal Server ( JSR168) as portlet applications.
The essence of OpenXava is that the developer defines instead of programming, and the framework automatically provides the user interface, the data access, the default behavior, etc. In this way, all common issues are solved easily, but the developer always has the possibility of manually programming any part of the application, in this way it is flexible enough to solve any particular cases. OpenXava is based on the concept of the business component.