Free software DVD player - AVS DVD Player

http://avsmedia.com/DVDPlayer/index.aspx

UNIVERSAL DVD, VIDEO & AUDIO PLAYER
Support for a very wide variety of video formats: apart from regular DVD (PAL, NTSC, VCD, SVCD) formats, also supported are: the entire range of MPEG4 (including DivX, XviD, etc.), MPEG1, MPEG2, AVI, Real Media video, Quick Time files, WMV files (including WMV-HD), H.263, H.264, mobile video formats (3GP, 3GP2, MP4).
This strong compatibility makes AVS DVD Player a universal player;

STEREO TO SURROUND TRANSFORMATION
With the inbuilt Surround Effect, a unique development of our software engineers, regular stereo movies can be watched with enhanced audio quality and imitated Multichannel surround sound (3.1, 5.1, 7.1 speaker configurations are supported);

EASY NAVIGATION BETWEEN SCENES
Easy and fast navigation, using sets of bookmarks, interactive chapter interface, ability to manage bookmarks and adjust access settings;

MULTILINGUAL SUPPORT
Ability to select between several audio tracks and subtitle files, support for multiple languages;

COMPLETE SET OF ESSENTIAL FEATURES
Traditionally available set for comfortable viewing - selection of the view angle (if available on a particular DVD), support for various video sources (HDD, portable media, LAN), automatically adjusted Aspect Ratio, one-click switch to full-screen mode, menu options available at a single mouse click, skinable interface etc.