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.
Plyr - A simple, accessible and customisable HTML5 media player
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.
Flowplayer - Flowplayer is a video player for web sites.