Musicolet - Musicolet is a small yet feature-rich offline Music Player for Android.
MiXplorer - MiXplorer is a mobile app that was designed to make it easy to organize and manage the files on your Android device.
AIMP - AIMP : Free Audio Player : Официальный сайт программы
Solid Explorer - Solid Explorer is a powerful Android file manager featuring access to most popular cloud storages, root access and easy extensibility.
Samsung Music - Samsung Music app supports playback of almost all audio formats so you can effectively enjoy songs from your phone’s storage.
Sliding Explorer - Sliding Explorer is a free fast and stylish file manager app specially designed for those who want to manage their phone files easily and quickly.