Musicolet - Musicolet is a small yet feature-rich offline Music Player for Android.
Winamp - Winamp is a media player that allows users to play multiple-file formats, arrange media in a varied file-management system, and play unique media with AAC encoding.
AIMP - AIMP : Free Audio Player : Официальный сайт программы
Samsung Music - Samsung Music app supports playback of almost all audio formats so you can effectively enjoy songs from your phone’s storage.
VLC Media Player - VLC is a free and open source cross-platform multimedia player and framework.
Poweramp - Music Player for Android