Playlist Machinery - Tools that help you create & organize your Spotify playlists
Vinyls - Vinyls is a music player that lets you listen to your music without any complicated setup.
Spotify.me - Beautiful analytics on your Spotify listening habits 🎧
Plexamp - A small music player with a number of unique features
Magic Playlist - Get the playlist of your dreams based on a song
SoundCloud Charts - The most played tracks on SoundCloud this week