VPlayer - VPlayer - a free music player for VKontakte.
VLC Media Player - VLC is a free and open source cross-platform multimedia player and framework.
Emit - Emit can stream from a Windows/Mac/Linux machine to an android/iOS device.
Minitube - Minitube is a YouTube desktop application.
MX Player - Powerful video player with advanced hardware acceleration and subtitle support.
foobar2000 - An advanced freeware audio player for the Windows platform.