OpenXava is a productive way for creating business AJAX applications with Java. With OpenXava you only need to write domain classes (simple Java or Groovy classes annotated with JPA) to get an application ready for production.
OpenXava 4.2.3 has been released just now.
This is a maintenance released with many bug fixes, look at the changelog for the list of fixed bugs.
The OpenXava team invite you to download and try this new OpenXava version.