TunesToTube - What does TunesToTube do?
Playlist Machinery - Tools that help you create & organize your Spotify playlists
Tovid.io - Upload mp3 to YouTube: image and audio are rendered to video and published to your channel.
Playlistor - Convert Apple Music playlists to Spotify and vice versa
Audioship - Upload audio to YouTube or Facebook
Tune My Music - Transfer Playlists Between Music Services