check out the following existing answers from this stackoverflow thread: augmented reality framework
This page http://socialcompare.com/en/comparison/augmented-reality-sdks also contains a lot of AR frameworks (maybe too much).
- IN2AR - http://www.in2ar.com/
- METAIO - http://www.metaio.com
- WIKITUDE SDK - http://developer.wikitude.com/documentation/android
- Vuforia - https://developer.qualcomm.com/mobile-development/mobile-technologies/augmented-reality