The Wub Machine - Turn any music into Dubstep, Drum & Bass, and more.
Spotify - Map shows when two people play same song at same time
YOU.DJ - Mix SoundCloud music and Youtube videos live in your browser.
Noon Pacific - The week’s best music handpicked & delivered to your devices
The Eternal Jukebox - For when your favorite song just isn't long enough
Playlist Machinery - Tools that help you create & organize your Spotify playlists