Eventbrite - Discover Great Events or Create Your Own & Sell Tickets
Spotify - Map shows when two people play same song at same time
Cvent - Cvent's event management software provides event planners with a complete solution to increase event attendance and decrease event costs.
SoundCloud - Enjoy music & follow favourite artists
EventMobi - EventMobi is an interactive mobile event app, audience response and engagement platform for conferences and trade shows.
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