MusicTwin Finder - Find your MusicTwin by your Spotify playlists in 5 seconds.
Playlist Machinery - Tools that help you create & organize your Spotify playlists
SoundCloud Charts - The most played tracks on SoundCloud this week
Playlistor - Convert Apple Music playlists to Spotify and vice versa
playAppleMusic.com - An (unofficial) web player for Apple Music
PlaylistMap - Connect with Spotify playlist curators from around the world