If you're talking about video players, it's inevitable to mention DivX Player due to its versatility and broad compatibility with many types of currently existing files.
This potent tool has a graphical interface that with time has become used as the basis for the creation of other similar players. This is due to its simple structure, which makes this tool an easy-to-use and truly effective utility.
In addition DivX Player gives you the opportunity to record CD's, a quality few players have. And as if this weren't enough, it has a small video file manager, which allows you to organise all video files.