I've recently open-sourced Stellar Forces, my Android turn-based strategy game. This includes all the sound, graphics and data, and even the Eclipse project files to make it really easy, cos I know what a pain it can be sometimes to get someone else's source to work.
Here's a few links:-
Source: https://bitbucket.org/SteveSmith16384/stellarforces
Game website: http://stellarforces.com/
Android app on Play: https://play.google.com/store/apps/deta ... .main.lite
I'm happy to respond to questions anyone has about getting it running or finding their way around the code etc..