ODJO - DJ music mixer. play, mix, record & share
Noiseblend - One-tap music for every occasion, with Spotify Premium
BeDJ - Marketplace of detailed mixing instructions to DJ sets
22tracks - DJ curated Spotify playlists on iOS
Playlistify - Make Spotify playlists from 1001tracklists & setlist.fm sets
Spotify - Map shows when two people play same song at same time