The GridSphere portal framework provides an open-source portlet based Web portal. GridSphere enables developers to quickly develop and package third-party portlet web applications that can be run and administered within the GridSphere portlet container (and hopefully other portlet containers when the portlet API becomes standardized by the JCP). Here you will find the GridSphere portal framework available for download and documentation related to the installation and developemnet of portlets using GridSphere.