My favorite
freeware image viewer has it all. It supports over 50 file formats, including
audio,
animated images, and
movies. My favorite features are
full-screen mode and back/next file in directory. Making viewing a directory full of
clip-art or
wallpaper loads easier. Such an easy feature to put in, but sooo useful. Everyone I've ever gotten to try it has it installed on every computer they own.
You can
download it at: http://www.irfanview.com/main3.html