This site is targeted towards Developers that want to build highly interactive web applications that deliver desktop quality of user interface. Oracle's REA technologies consist of Oracle ADF Faces Rich Client and Oracle WebCenter. URL: http://rea.oracle.com.
When you click the "Explore Now" button, you see a very nice tree with topics, where you can flip each node to see a small explanation, or expand it to see new nodes with subtopics.
