VLC, or VideoLAN Client, is a program to play a wide array of video file formats as well as act as a video streaming server. It will also play audio files. It is a free, open source program that is available for Windows, Macintosh and Linux computers.
We like VLC because of its universality, as it will play Windows video (.avi, and .wmv), Quicktime (.mov), Flash video (.flv), DivX and other MPEG4 formats such as h.264 (mp4), as well as standard DVDs. It will even handle popular audio file formats (mp4, m4a). It’s definitely a handy program to include in your software toolkit.