Visualify - Visualize your top artists on Spotify
drumbit - A very easy to use drum machine.
SYQEL - Bring your music to life
Type Drummer - Drum by typing
Kaleidosync - Kaleidosync is an all-in-one Spotify music visualizer that is all set to deliver a top-notch music experience with real-time support.
Sampulator - Make (and record) beats on your keyboard