VLC Media Player - VLC is a free and open source cross-platform multimedia player and framework.
VideoJS - VideoJS is an HTML5 Video Player, built with Javascript and CSS, with a fallback to a Flash video...
foobar2000 - An advanced freeware audio player for the Windows platform.
Video Hub App - The fastest way to browse, search, and manage videos on your computer. Like YouTube for videos on your computer!
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.
JW Player - JW Player is an embeddable media player.