slack-fm - Self-hosted service to sync Last.fm with your Slack status
Magic Playlist - Get the playlist of your dreams based on a song
Slack Status Icons - A custom set of status emojis for Slack
Spotalike - Spotify playlist with similar songs, according to Last.fm
JQBX - turntable.fm for spotify
Playlist Machinery - Tools that help you create & organize your Spotify playlists