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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.

AudioBus - With Audiobus, the revolutionary new inter-app audio routing system, you can connect your...

Spotify.me - Beautiful analytics on your Spotify listening habits 🎧

Go Button - Go Button is a mobile audio app designed to provide professional playback of music and sound effects for live shows. It provides a creative, self-contained show control system that runs on your iPad, iPhone, or iPod touch.

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