Magic Playlist - Get the playlist of your dreams based on a song

X-Minus.pro - X-Minus.pro is an artificial intelligence-based tool that allows you to separate vocals from a song.

Spotalike - Spotify playlist with similar songs, according to Last.fm

Al Vocal Remover - Al Vocal Remover is an online audio editor that allows you to remove vocals and extract karaoke separately from a song.

Playlist Machinery - Tools that help you create & organize your Spotify playlists

Vocal Extractor - Vocal Extractor- Karaoke Maker (iPhone) is an app that allows you to separate karaoke and vocals from a song or audio file.