my favorite is irfranview. It's a VERY simple program, that does just the basics. Because it's sooo simple, it has almost no overhead (I think the whole program is like 100k or so), but it will play/view ANYTHING. It's great for viewing images. Don't get me wrong though, it does have some good features however (like a slideshow, resize/resample, change color depth, change file format, ect...). I forget where I got it from, but if you e-mail me (Newton_Scott@roberts.edu), I'll send ya the install program. It is freeware. (check
www.download.com though, it may be there).