Discover on Demand - Just like Spotify's Discover Weekly, but whenever you want.
Spotify - Map shows when two people play same song at same time
Rocketgraph - Rocketgraph is an open-source drop in replacement to Firebase, except it's much better.
Deezer - Deezer is a music streaming app created in France. It is available in 180 counties and gets 16 million users a month. 6 million of the users have paid subscriptions. Read more about Deezer.
Last.fm - The world's largest online music service. Listen online, find out more about your favourite artists, and get music recommendations, only at Last.fm
Yeloha - Airbnb for solar power