VLC Media Player - VLC is a free and open source cross-platform multimedia player and framework.
SageThumbs - SageThumbs is a powerful shell extension allowing to preview enormous amount of image formats...
AIMP - AIMP : Free Audio Player : Официальный сайт программы
MysticThumbs - MysticThumbs generates thumbnails of many image types not natively supported by Windows.
foobar2000 - An advanced freeware audio player for the Windows platform.
Icaros - Icaros is a collection of lightweight, high quality, Windows Shell Extensions