FriendLife - FriendLife is a great and interesting way of making new and dashing friends for free.
Spotify - Map shows when two people play same song at same time
Twoo - With the millions of active and interesting people around the world, Twoo is one of the most interesting and practical means for finding the new people across the globe.
SoundCloud - Enjoy music & follow favourite artists
Qeep - If you are looking for a dedicated application freely allowing you to meet new people and find interesting friends, then Qeep is an application to whom you must give at least one try.
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