Garvuino (Edit)
Here is the Garvuino!
It's an electronic board powered by an Arduino and an atmega8 chips, which can make different kind of noise or music.
It can play AY and YM files, some beeper music, be used as a SID synth or use the Mozzi sketches.
More informations on https://github.com/farvardin/garvuino/