VideoJS - VideoJS is an HTML5 Video Player, built with Javascript and CSS, with a fallback to a Flash video...
VLC Media Player - VLC is a free and open source cross-platform multimedia player and framework.
Plyr - A simple, accessible and customisable HTML5 media player
foobar2000 - An advanced freeware audio player for the Windows platform.
MediaElement.js - MediaElement.js provides HTML5 audio and video players in pure HTML and CSS.
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.