Apple iTunes
Rhapsody
LoudEye-OD2
MPGreek
Sonific
MusicIsHere
Sony Connect
PassAlong
MP3-Extension
Ruckus
MSN Music
MusicNet
GreatIndieMusic
Liquid Digital Media
Inprodicon
Arvato
Bitmunk
AudioLunchbox
BuyMusic
Choice Records
Daiki (Music Online Corp)
DigitalKiosk
Flip Technologies, Inc.
MOD Systems
Chondo
Destra
Emusic
Interia
MP3tunes
USEN Corporation