foobar2000 - An advanced freeware audio player for the Windows platform.
Minitube - Minitube is a YouTube desktop application.
VLC Media Player - VLC is a free and open source cross-platform multimedia player and framework.
Clementine - Clementine is a cross-platform free and open source music player and library organizer based on...
AIMP - AIMP : Free Audio Player : Официальный сайт программы
MusicBee - While iTunes might be the benchmark music organizer and player app, MusicBee is a strong alternative that many prefer.