I wanted a tool to help me find music based on elements of music that I personally liked, and figured I could make something that would do it for me.
Synthetic connects to Spotify and calculates scores for songs from curated playlists (or it's entire library) based off user input. Then you preview the top picks and can add them to your library.
Search Engine dedicated to music. A website to find all music and playlists from Spotify, Apple Music and SoundCloud. Crowdsourced, bands can submit their music and let the engine index it for better search results.