VLC, which used to stand for VideoLAN Client, is a popular media player that is available for Windows, Linux and MacOS. It is free to download and install, and has gained popularity thanks to its built in support for over three dozen audio and video codecs, without requiring any additional downloads or configuration. In addition to playing media, VLC can also be used to transcode media between formats. The latest version can be extended with plugins. The source code for VLC has been made available under the GPL.
This guide shows you how to install and use VLC, and provides some tips on VLC's more advanced features.