ODJO - DJ music mixer. play, mix, record & share
The Wub Machine - Turn any music into Dubstep, Drum & Bass, and more.
BeDJ - Marketplace of detailed mixing instructions to DJ sets
YOU.DJ - Mix SoundCloud music and Youtube videos live in your browser.
Playlistify - Make Spotify playlists from 1001tracklists & setlist.fm sets
The Eternal Jukebox - For when your favorite song just isn't long enough