Jetspeed
Jetspeed is a multi-device portal system with simple syndication capabilities
org.apache.jetspeed.portal.portlets.NewRSSPortlet
http://portals.apache.org/jetspeed-1/channels/jetspeed.rss
Turbine
Turbine is a java web application development framework
org.apache.jetspeed.portal.portlets.NewRSSPortlet
http://portals.apache.org/jetspeed-1/channels/turbine.rss