SMPlayer is a free media player for Windows with built-in codecs that can play virtually all video and audio formats. It doesn't need any external codecs. Just install SMPlayer and you'll be able to play all formats without the hassle to find and install codec packs. One of the most interesting features of SMPlayer: it remembers the settings of all files you play. SMPlayer supports the most known formats and codecs: avi, mp4, mkv, mpeg, mov, divx, h.264, and so on.