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 and M3L
- iriver: iHP100 series, H100 series, H300 series and H10 series
- Olympus: M:Robe 100
- SanDisk: Sansa c200 series, e200 series and e200R series
- Toshiba: Gigabeat X and F series