Liyo - Stream your favorite music live with friends 🎶
Magic Playlist - Get the playlist of your dreams based on a song
Playlist Machinery - Tools that help you create & organize your Spotify playlists
Jukebox - Collaborative music player
Spotify.me - Beautiful analytics on your Spotify listening habits 🎧
Rhythmbox - Rhythmbox is an audio player for Linux that plays and organizes digital music.