Oracle ADF Essentials

Oracle Application Development Framework (Oracle ADF) is a Java EE development framework that simplifies and accelerates enterprise application building. Oracle ADF Essentials is a free packaging of this framework  that can be used to develop and deploy applications without licensing costs.

It includes many ADF technologies: Oracle ADF Faces Rich Client Components, Oracle ADF Controller, Oracle ADF Binding, Oracle ADF Business Components.
In this document oracle specify that removes licensing barriers for adoption of the Oracle ADF technologies to increased use of Oracle ADF can also help the adoption and usage of Java in enterprise applications.
Oracle ADF Essentials supported environments are Oracle WebLogic 11g, GlassFish 3.1, and WebSphere 7.
Oracle ADF essentials is, in practice, a light version of oracle ADF. The following features are not part of the product Oracle ADF Mobile, Oracle ADF Desktop Integration, Oracle ADF Security, The Oracle ADF Web service data control, Oracle ADF remote taskflows, Oracle ADF Business Component’s Service Interfaces, and more ...

Here you can find ADF essentials libraris.

Enjoy!