Musicolet - Musicolet is a small yet feature-rich offline Music Player for Android.
Spotify - Map shows when two people play same song at same time
Palco MP3 - Palco MP3 is the largest Brazilian application for independent artists and offers more than 1 million songs for you to listen and download on your mobile device.
SOUNDS - Discover music with friends
Audiomack - The free SoundCloud alternative
Songlink - Share music with anyone.