Musicolet - Musicolet is a small yet feature-rich offline Music Player for Android.
iMazing - iMazing lets you transfer music, files, messages, apps and more from any iPhone, iPad, or iPod to a computer, Mac or PC. Manage and backup your iOS device simply without iTunes. (was DiskAid)
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.
CopyTrans - CopyTrans is a tool for managing the files on your iPhone or iPad through your computer's interface.
Audiomack - The free SoundCloud alternative
iExplorer - iExplorer lets you easily transfer music, playlists, text messages, files and more from any iPhone, iPod, or iPad to a Mac or Windows computer and iTunes.