IOTransfer - IOTransfer 3 - iPhone/iPad manager and iPhone transfer software to easily manage/transfer/sync/backup photos, music, videos, contacts, etc.
Spotify - Map shows when two people play same song at same time
WinX MediaTrans - WinX MediaTrans shows its full ability to sync iOS files between iPhone, iPad, iPod Touch and PC, implementing 2-way transfer of photos, music, videos, e-books and other media files (including iTunes purchases).
Last.fm - The world's largest online music service. Listen online, find out more about your favourite artists, and get music recommendations, only at Last.fm
iMyFone TunesMate - iMyFone TunesMate is your Must-Have iphone manager and iTunes rebuilder.
SoundCloud - Enjoy music & follow favourite artists