Playlist Machinery - Tools that help you create & organize your Spotify playlists
Symphona App - Designed to make orchestral staff management a breeze.
Playlistor - Convert Apple Music playlists to Spotify and vice versa
SoundCloud Charts - The most played tracks on SoundCloud this week
FreeYourMusic - Migrate from and to any music services
JamBuddy - Find and collaborate with musicians around you thru Spotify