Songstack - Swipe to discover new music for Spotify
Beata - For discovering the best new music from around the web
BandNext - Discover bands that sound similar to artists you already love with BandNext. A single click saves your results to a Youtube playlist.
avant.fm - Avant.fm provides a customizable, listenable feed of new releases from the best indie record labels, across all genres.
22tracks - DJ curated Spotify playlists on iOS
CLiGGO MUSIC - CLiGGO MUSIC provides free music enjoyment on your pc, smart phone or tablet.