Short disclaimer: Spotify stopped to promote and showcase third-party apps for ages - why not try to post the news here? 🙂
Spotify has maybe the largest music database in the world but I think many will agree that it's almost impossible to explore this whole world of delights using their own apps and tools. At least to explore efficiently. Being both a music addict and a professional programmer I've recently started to play with Spotify APIs and developed a small web app to free me out from the bubble of automated recommendations.