Magic Playlist - Get the playlist of your dreams based on a song
Soundplate Clicks - The ultimate smart link system for music marketing
Spotalike - Spotify playlist with similar songs, according to Last.fm
Label Engine - Label Engine is a digital music distribution platform intended for sharing and promoting music around the globe.
Playlist Machinery - Tools that help you create & organize your Spotify playlists
DistroKid - Unlimited uploads to iTunes and more. Keep 80-100% of your royalties.