I am working on making Jersey web services available using OAuth2 to other clients and am having a tough time finding libraries that tie in nicely with Jersey. So far I have looked at the following libraries.
http://static.springsource.org/spring-security/oauth/support.html
We got the demo working, but do not want to use spring security.
https://labs.ericsson.com/apis/oauth2-framework/downloads
This is tied tightly to RESTLet.
http://wiki.apache.org/incubator/AmberProposal
We looked briefly, but it hard to tell the status of the project.
https://bitbucket.org/smartproject/oauth-2.0/wiki/Home
We just started looking at this one as well.
The main goal we have is simple integration with Jersey as a Resource Provider.
We ended up using Amber, modifying the endpoints from the integration tests as needed.
oauth-2.0/integration-tests/src/test/java/org/apache/oltu/oauth2/integration/endpoints/