Play audio and video files in this Windows frontend for MPlayer.
...For most media files, no additional codecs are needed (Binary Codec Package is already include). The most important MPlayer options (aspect ratio, deinterlacing, and postprocessing) can be configured without typing in cryptic command-line options. Support for multiple audio and subtitle tracks on DVDs.
ffdshow is DirectShow and VFW codec for decoding/encoding many video and audio formats, including DivX and XviD movies using libavcodec, xvid and other opensourced libraries with a rich set of postprocessing filters.