You can now download an Eclipse plugin to view javadocs for your favorite API available through Javaref right in your Eclipse IDE. Download the plugin here.
Businesses providing training and consulting services around popular frameworks can now advertise their services in the javadoc pages. See an example of a sponsored framework page for the Struts lirary: Library, Package and Class (see "Services" tab for package and class).
Can't find an API you use on Javaref? Leave us a note.