I found Kilobolt. It seems to me that this is useful, but I'm not sure if it is open source.
And there is another similar question before, but published 2 or 3 years ago. I think everything has changed?
There are several of them that are the source of Ope and are really good. A couple of them I tried and found helpful are:
Cocos3D for Android
Andengine
This is a 2D and 3D game development. Library for Android.
I suggest: libgdx. This is the best for me. Download here: LibGdx
...
Alien3D
Ardor3D
Cocos3D
... , http://mobilegameengines.com/android/3d_game_engines
( , AndEngine 3D-, )
Also jMonkeyEngine: http://jmonkeyengine.org/ , although it is not only for Android, but for Java in general.