VideoLanClient is a MediaPlayer that plays various multimedia formats including DVD movies, DivX, and others. It is available for:
VideoLanClient is recommended by eMule for previewing downloaded video.
There is also a VideoLanServer? (DebianLinux package "vls") that can stream such videocasts to a VideoLanClient located elsewhere.
The homepage is: http://www.videolan.org/.
One page links to VideoLanClient: