ADF is a J2EE framework developed by Oracle, it is free and can be deployed to Glassfish. I spent about 5 hours getting everything setup and running on Amazon EC2. This set of youtube tutorials are the result of my efforts. Check them out and let me know 

Part 1 – Setting up Linux AMI instance
Part 2 – Local software install and ssh/sftp setup.
Part 3 – Remote software install, db & datasource config.
Part 4 – Jdeveloper connection setup, build simple ADF app.
Part 5 – Deployment

 

More info at my blog at:

http://wesfang.wordpress.com/