Great news from Oracle today, the Ellison's Company announced a completely free version of Oracle ADF, the Java Development Framework.
This ADF version is named Oracle ADF Essentials and with it you are able to develop and deploy applications that include ADF Business Components, ADF Controller, ADF Binding and ADF Faces Rich Client Components without licensing costs.
You can deploy your ADF Essentials applications on no-cost Oracle Glassfish application server.
Follow few useful links about this new:
Dive into ADF
Shay Shmeltzer's Weblog - Deploying Oracle ADF Essentials Applications to Glassfish