Spotify - Map shows when two people play same song at same time
Time Buddy - Time Buddy brings a colorful world clock.
SoundCloud - Enjoy music & follow favourite artists
Time Zones Converter - Time Zones Converter is an application which as the name implies, is used for converting time zones.
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
World Clock - World Clock is an app that lets you see the time of any city in the world.