GOM Player
GOMmedia player is a seamless and simple player for your videos. Taking a wide range of files, it also works with free to download video converter that you can find on the GOMmedia player website.
Even better, it automatically searches for the appropriate codecs online, so in case you find yourself needing one, the GOM Player will get it for you automatically. The available codecs include less common DAT, MPEG, DivX, XviD, WMV, ASF, AVI, and MOV, as well as more common ones like FLV1, AC3, OGG, MP4, and H263.