AddThis - AddThis free website tools include share buttons, targeting tools and content recommendations help you get more likes, shares and followers and keep them coming back.
Spotify - Map shows when two people play same song at same time
Sharingbuttons.io - Quickly generate social sharing buttons with a tiny performance footprint.
SoundCloud - Enjoy music & follow favourite artists
AddToAny - Share buttons by AddToAny, the universal sharing platform for websites and apps.
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