SubmitHub - SubmitHub makes it easy to contact music bloggers, Spotify playlisters, record labels and more. We give you all sorts of statistics and ways to filter who to send your music to.
last-slack - Display your scrobbled tracks from last.fm in Slack
Spotify.me - Beautiful analytics on your Spotify listening habits 🎧
Owlead - Grow your Twitter with valuable followers, effortless
Spotalike - Spotify playlist with similar songs, according to Last.fm
Sound Control - App-specific volume control