Windows Media Player - Get information about Windows Media Player and other Windows Media technologies.
IINA - The modern video player for macOS
VLC Media Player - VLC is a free and open source cross-platform multimedia player and framework.
XULPlayer - XULPlayer is an open-source media player and converter built on Mozilla XUL and MPlayer.
BitTorrent Live - Live streaming video. iPhone, Apple TV, MacOS. Android soon.
Kaffeine - Kaffeine is a media player for the KDE desktop environment.