Libgdx-demos is a project mainly written in Java, it's free.
demos for the libgdx Androuid game engine
libgdx-demos
A listing of demo's for the libgdx Android game engine, found at http://code.google.com/p/libgdx/ This started as a project for the computer science club (ARCDev) at American River College in Sacramento, CA. Please use for educational purposes.