BS.Player Free 2.51 Description:
BS.Player Free 2.51 features anything you need to watch movies or any other kind of video on your PC.
BS.Player Free 2.51 supports all popular video formats (and audio as well, in case you were wondering) and though its basic interface is not really the nicest one I've seen, you can easily customize it with skins. Also, if you're missing any video or audio codecs, BS.Player Free 2.51 will download them right away during installation.

BS.Player Free 2.51 supports video subtitles, takes screenshots of movie currently playing, lets you create bookmarks and chapters to move along videos more easily and has also support for plug-ins. I especially liked the way you can control playback, either by using keyboard shortcuts or simply your mouse: one click to stop the video, two clicks to go full screen, mouse wheel to raise or low the volumes...

The only drawback to BSPlayer, if any, is the fact that the program doesn't include any documentation except for a FAQ section that you need to open in your browser. Not that you can't use the program without help, but it's always nice to have some documentation to rely on in case you get stuck.