
A growing number of portlet bridges designed to interface with existing web development frameworks have emerged as well as thrid part portlet development models. The Jakarta Portals Bridges project provides support for common web frameworks like Struts, JSF, PHP, Perl and Velocity.
The Struts bridge has been included in GridSphere allowing developers to reuse existing Struts applications, with the following caveats and features
The Spring framework offers an MVC development model for web applications including portlet development.
Have a look at the following wiki for more details including a sample application which works under GridSphere! :-)
Kosmos 0.2.0RC1 open source project monitoring portlet suite developed at JBoss Labs (http://labs.jboss.com), has been released. Its aim is to give you a quick and easy way to set up project dashboard portal pages.
Version highlights are:
A few sites offering portlet repositories are now available. Some such as the Portlet Open Source Trading (POST) site have only a few limited portlets that may prove useful. More recently the JBoss PortletSwap site appears to have more useful offerings.