RockBox is a free and open source firmware available for several different digital music players. Stable releases are available for the following music players: Apple: iPod 1g through 5.5g, iPod Mini and iPod Nano 1g Archos: Jukebox 5000, 6000, Studio, Recorder, FM Recorder, Recorder V2 and Ondio Cowon: iAudio X5, X5V, X5L, M5, M5L, M3 …