Noiseblend - One-tap music for every occasion, with Spotify Premium
Playmoss - Create playlists from YouTube, Vimeo and SoundCloud
cmd.fm - Command-line radio for geeks
Playlist Machinery - Tools that help you create & organize your Spotify playlists
Caset - Caset is a new app that reinvents mixtapes for the iPhone era.⠀You can make incredible mixtapes, collaborate with friends, and enjoy music together in an all new way.
Audioship - Upload audio to YouTube or Facebook