doubleTwist - Music Player for the Internet of Things. Described as the iTunes for Android, doubleTwist brings you music, radio and podcasts everywhere. Free download.
Musicolet - Musicolet is a small yet feature-rich offline Music Player for Android.
SyncMate - SyncMate is a Mac sync software which will sync Mac with Android, Nokia and Windows Mobile phones, iOS devices, other Macs, online accounts, etc.Android sync Mac - Devices - Free vs. Expert - SyncMate Customer Support .
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.
SyncMe - Copy, move, sync and backup your mp3, pictures and documents over WiFi, cellular VPN or wired...
Audiomack - The free SoundCloud alternative