Chrysalis, a new web framework

On TheServerSide.com, there was an
 introduction to the open-source web framework 
 Chrysalis. Besides using the MVC architectural pattern,
 the developers aimed to offer a lightweight alternative to the more complex Struts. The framework's innovations include

• hierarchical configuration
• client-side validation of input parameters
• support for Filters even in older containers (Servlet 2.2)