Vibeify plots every track in your Spotify playlists into three dimensions by how it actually sounds — tempo, energy, valence and the rest of Spotify's audio features, reduced with UMAP. Tracks that sound alike end up near each other, so the map is something you can fly through. Click one and the radio plays the next most similar track, over and over.
Project 30. Free, runs in the browser, needs a Spotify account.
It maps the audio features of your Spotify playlists into a 3D space, allowing you to visualize which are similar and different. You can jump through them and skip to the most similar one. The goal was to basically create a radio station, which just plays the next most similar song in your playlists, but it got long and the sun's out so tengo que ir a disfrutar.