Wicket (Apache Wicket) is a web application framwork for java - this ones for all ye java lovers out there that wants to do web applications. Its lightweight and the libraries are pretty much updated. It has been around since 2004, when it was programmed by Jonathan Locke back in april of 2004 - but on 2007 it became main stream when it became an official apache project - All ya java lovers out there! Dive in to wicket!
Check out this free online guide that will help you start using wicket.