Detour - Immersive audio walks, now in 17 cities
Magic Playlist - Get the playlist of your dreams based on a song
City Walks - A platform that you can virtually wander around the world.
Spotalike - Spotify playlist with similar songs, according to Last.fm
Radiohere - Hand curated multi lingual online radio stations
Playlist Machinery - Tools that help you create & organize your Spotify playlists