OpenXava 3.1 is a framework to develop AJAX Java Enterprise applications in a different way: OpenXava avoids MVC. You provide only simple Java classes annotated with JPA and you obtain an application ready for production. With OpenXava, you only need to write your model, POJOs and Java 5 annotations. You do not need to write the view, and the controller (for CRUD, printing, etc) is reused. And from that you'll have an application for CRUD, report generation in PDF, export to Excel, searching, sorting, validations etc. You only need to write a simple Java class, no XMLs, no JSPs and no code generation.

More info: OpenXava