BS.Player

BS.Player is the perfect video player for those moments when you prefer watching movies and TV series on the computer rather than doing it on the couch. 
All the formats and features you might need

BS.Player is a great media player that features anything you need to watch movies or any other kind of video on your PC. BS.Player 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 will download them right away during installation.

BS.Player 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, making it very similar to apps like UMPlayer. 
Shortcuts
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 lower the volume... It's really comfortable.

Reliable and easy to use
BS.Player is reliable and full of features. The only drawback 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 BS.Player without help, but it's always nice to have some documentation to rely on in case you get stuck.

Overall
BS.Player lets you enjoy your favorite movies on the PC with a wide range of features: subtitles, screenshots, bookmarks and more. 
BS.Player supports the following formats
AVI, MPEG 1, MPEG 2, XVID, DivX, 3IVX, OGG, OGM, MATROSKA, ASF, WMV, WAV, MP2, MP3, JPEG, GIF, BMP

Download