Songlink - Share music with anyone.
Audioship - Upload audio to YouTube or Facebook
aux.app - A free web-based music platform to play music from other popular online streaming services.
Move to Apple Music - Convert your Spotify playlists for Apple Music
humit - A social networking app for music sharing and discovery.
podsync - Simple and free service that lets you listen to any YouTube or Vimeo channels, playlists or user videos in podcast format