Magic Playlist - Get the playlist of your dreams based on a song
Tettra - Tettra is a company wiki that helps teams manage and share organizational knowledge.
Spotalike - Spotify playlist with similar songs, according to Last.fm
Slinky - Your slack links — organized!
Playlist Machinery - Tools that help you create & organize your Spotify playlists
Obie.ai - Access knowledge quicker without leaving Slack