I hope that you don't mind if I announce here a new open source Java, XSL and Ajax based application framework called "MoreMotion AF"
The major motivation to have a look at "MoreMotion AF" would be it is a STABLE, MATURE and PRODUCTIVE framework which has been in use for years.
It can be a real competitor for Struts, Spring and Cocoon since it introduces a different approach to building XSL and Ajax based Java applications.
Its integrated MVC architecture targets to minimize the need for Java coding on a high level. Even big sized applications can be developed without writing single line of Java code.
For the exceptional cases the framework allows custom development.
My company decided to go to open source to accelerate its spread in the community.
Just have a look http://www.moremotion.org