KDE Connect - Integrate Android with the KDE Desktop
VLC Media Player - VLC is a free and open source cross-platform multimedia player and framework.
VLC Mobile Remote - This VLC Remote app for iPhone, Android & iPad lets you control VLC Player on PC or Mac. Also browse, play computer files & YouTube, Netflix, Prime videos.
AIMP - AIMP : Free Audio Player : Официальный сайт программы
Unified Remote - Unified Remote is a software app available for iPhone, Android, and Windows Phone mobile operating systems. It's designed to turn your smartphone into a universal remote. Read more about Unified Remote.
foobar2000 - An advanced freeware audio player for the Windows platform.