22tracks - DJ curated Spotify playlists on iOS
Playlist Machinery - Tools that help you create & organize your Spotify playlists
Spotify - Map shows when two people play same song at same time
Playmoss - Create playlists from YouTube, Vimeo and SoundCloud
Yeloha - Airbnb for solar power
podsync - Simple and free service that lets you listen to any YouTube or Vimeo channels, playlists or user videos in podcast format