VLC Media Player
VLC Media mlayer has grown so popular that when it comes to video playback, no matter which operating system you might be using, VLC often serves as the native application. The default media player program in Windows, commonly called Windows Media mlayer, does not really offer codecs out of the box. If you need a media player that supports a wide range of audio and video codecs, VLC Media mlayer has got you covered! No matter where your media resides—audio CD, video DVD, hard drive, or a live stream off the Internet—VLC mlayer will not let you down. It also comes with media conversion and streaming features.
Website: http://www.videolan.org/vlc/