KOLLEKT.FM - Stay up to date with new music shared by sources you trust
Gnoosic - Even if you don't know what you are looking for - gnod will find it.
Maloja - Simple self-hosted music scrobble database to create personal listening statistics.
BandNext - Discover bands that sound similar to artists you already love with BandNext. A single click saves your results to a Youtube playlist.
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.
Musicroamer - A visual Pandora for discovering new music