OAuth 2.0 Client Demo
You can run OAuth 2.0 client demo locally. Simply download and run (mvn jetty:run) OAuth 2.0 demo module and point your browser to http://localhost:8080. It works great with every site that supports OAuth 2.0 (at least draft 10), i.e. Facebook or GitHub.
Note: see also https://issues.apache.org/jira/browse/OLTU-50