Video DownloadHelper - Browser extension to download videos from the Web
Spotify - Map shows when two people play same song at same time
Mp3jam - Search for favorite music and download full albums with one click! Features
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
Sonerezh - A self-hosted, web-based application for stream your music, everywhere.
SoundCloud - Enjoy music & follow favourite artists