I recently installed vector pinball from @fdroidorg - great to kill some time, and especially fun because of the sound effects and background music. Out of curiosity I followed the link to the README in it's github repo. In it, the author thanks the guy who added the sound effects and music, who wanted to try out a sound library for android and therefore sought out a silent open source game and created sounds and music for it. He wrote an article about it here: https://www.twittering.com/webarchive_articles/FMOD%20for%20Android%20-%20O'Reilly%20Broadcast.html
So thanks to this exemplary #FOSS collaboration I'm having a good time, whenever I have a five minute break.
