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
SoundCloud - Enjoy music & follow favourite artists
Mp3Bear - Mp3Bear is an Mp3 music search engine that locates the mp3 files all over the net.
Ampache - Web ( HTTP centralized ) based audio/video streaming application