VLC Media Player
Another program that I find very useful in my arsenal of free tools, is VLC. VLC is an open source video player, that literally plays any media file. So if you need to play a Quicktime File, or even an AVI, you can use VLC. I find this program exceptionally useful when I have to rebuild systems and cannot get to, or install the original DVD software. VLC does a great job just playing DVDs as well as everything else. It’s interface is simple and intuitive, and has a large amount of options that the normal user will probably never use. So if you are in a bind and need to play a DVD or media file and don’t have a player, don’t stress, get VLC.