humit - A social networking app for music sharing and discovery.
BandNext - Discover bands that sound similar to artists you already love with BandNext. A single click saves your results to a Youtube playlist.
Songlink - Share music with anyone.
Musicroamer - A visual Pandora for discovering new music
Son.gg in Slack - Share music with your team in Slack
stats.fm - With the click of a button you'll be logged with your Spotify account and you'll instantly gain access to a valhalla of cool stats and insights.