Kantaris can play almost anything you can throw at it -- AVI, MPEG, MGEG-AVC, WMV, MOV, MKV, quicktime, matroska, divx, xvid, H264, MP3, WMA, OGG files and more. Kantaris can also play DVDs and audio CDs. The player also displays some of the most beautiful music visualizations ever seen. All this is completely free.