Spotify - Map shows when two people play same song at same time
Thyself - Mindful mood tracking for greater self-awareness
Playlist Machinery - Tools that help you create & organize your Spotify playlists
NOISESUPPLY - Pandora for SoundCloud
Magic Playlist - Get the playlist of your dreams based on a song
Moodflow - Moodflow app offers features that let you track your mood, emotions, and thoughts so you can have deeper knowledge about yourself.