Spotify - Map shows when two people play same song at same time
Courseroot - Biggest online course database on the web
SoundCloud - Enjoy music & follow favourite artists
Alcamy - Free, open self-learning platform. Learn & teach anything.
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
CurrencyStack - A free modern currency data API for fintech apps.