Game Spice is the FREE Facebook and gamification service for your cocosd2-x project.
The Facebook integration for Android is working with some limited functionality, the SDK is developed actively and it will support
lot of other features. Currently supports only 3.0
Everything is FREE and it uses open source SDK.
The code uses C++ to Java bridge via JSON messages and uses raw JNI the other way around. It is really easy to add new functionality using native Android features.
Info on the web: http://cocos2d-x.org/hub/106Source code: https://github.com/gamespice/gamespicex
Currently the project supports Android Facebook integration. iOS support is up next.
Please, take a look