I've tried about every free one and I can't recommend any except the one Angel suggested.
If you want a full-featured and powerful Program I recommend Photobrush ($38.00) and a great deal for all it does. I use it every day. (supports Photoshop Plugins and some PSP stuff). That really extends it's potential. (You can try it for 30 days Free).
http://www.compactdraw.com/pbrush/index.html
(IrfanView also supports Photoshop Plugins). You'll want to get IrfanView even if you get Photobrush. It's great for optimizing images for the web and resizing, cropping etc. Also has thumbnail viewer and slideshow. Lots of it's own Plugins make it versitile.
(Music-Video-etc). Dispays animated Gif's too.
Good luck and Happy Imaging.
AZ
