SageThumbs - SageThumbs is a powerful shell extension allowing to preview enormous amount of image formats...
VLC Media Player - VLC is a free and open source cross-platform multimedia player and framework.
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
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.