Magic Playlist - Get the playlist of your dreams based on a song
AfterShip - AfterShip is the shipment tracking API for ecommerce businesses and marketplaces.
Spotalike - Spotify playlist with similar songs, according to Last.fm
TrackChecker Mobile - TrackChecker Mobile app features tracking of parcels and online orders, so users don’t have to worry about losing a package by tracking the parcel right on their mobile phone screen.
Spotify - Map shows when two people play same song at same time
Track24 - Track24 app assists you in tracking the packages of more than 600 international courier and postal services from all around the globe.