Musicolet - Musicolet is a small yet feature-rich offline Music Player for Android.
Openwhyd - Collect and Share the tracks you love.
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.
Music Smasher - Find any song. Music Smasher searches Spotify, Rdio, SoundCloud, Bandcamp, and YouTube.
Audiomack - The free SoundCloud alternative
FoxTube - Play YouTube video continuously with playlists. FoxTube features: