mp4 player free download for vistaNeed a FREE converter from .AVI to DIVX or MP4 for my MP3 player?

Hi all, I did my research here before asking this. But the Softwares that they suggested wmp4 player free download for vistaere NOT compatible with my Windows Vista OS. Any suggestions of a FREE Software to downloamp4 player free download for vistad from AVI to DIVX or MPEG 4? Thanks a Million!
xilisoft
the newest divx version will do that