Shopify - Shopify is a powerful ecommerce platform that includes everything you need to create an online store and sell online. Try it free for 14 days.
Spotify - Map shows when two people play same song at same time
WooCommerce - A freely available eCommerce plugin that enables shop facilities on your WordPress website. Functionality enabling extensions & beautiful themes available.
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
OhoShop - OhoShop is a mobile eCommerce platform which creates iOS and Android shopping cart apps for local businesses.
SoundCloud - Enjoy music & follow favourite artists