JET - Java Enterprise Turbine is a web framework which offers an easy to use web development environment. The focus is on building and reusing forms instead of whole pages like JSP. JET uses "Freemarker templates" to generate html pages.
Open source project that offer summary and download services on this page is a project that carry out their development work on other open source development sites. Their work is linked to this page via a feature called OFI, and their work is not carried out here on OSDN site.