VLC Media Player - VLC is a free and open source cross-platform multimedia player and framework.
Celluloid - Celluloid (formerly GNOME MPV) is a simple GTK+ frontend for mpv. Celluloid interacts with mpv via the client API exported by libmpv, allowing access to mpv's powerful playback capabilities.
Corel WinDVD Pro - Get top-quality playback with the world’s most popular Blu-ray and DVD software, Corel WinDVD Pro 12
SMPlayer - SMPlayer is a free video and audio player for both Windows and Linux that allows you to play almost all media files without having to install additional codecs. Read more about SMPlayer.
Switch Player - Media playback, inspection and conversion tool
QMPlay2 - QMPlay2 is a video and audio player which can play most formats and codecs.