Spotify - Map shows when two people play same song at same time
SyncBird Pro - [Best iPhone iPod Transfer] SyncBird Free is the perfect iTunes alternative software that can transfer your music, photos, videos, ringtones between your iPhone, iPad, iPod and Mac.
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
Backdoor - Honest and Anonymous Feedback About Colleagues
SoundCloud - Enjoy music & follow favourite artists
Mentio - Keep track of all your Music, Movie or App recommendations