Discover on Demand - Just like Spotify's Discover Weekly, but whenever you want.
Vinylify - Create your own personalized vinyl record online
Rocketgraph - Rocketgraph is an open-source drop in replacement to Firebase, except it's much better.
VinylWall - Rediscover record collecting
Spotify - Map shows when two people play same song at same time
SOUNDS DELICIOUS - A vinyl club for full-length cover albums.