Hi david,
check out the
list of awards given to XnView. The most recent compared review would probably be Softpedia's
Free Image Viewers Challenge of July 15, 2006:
Codrut Nistor wrote:XnView 1.82.4
Final station, my friends! This is Feature-Feast City, and you can visit the Plugins Park and many other attractions!
XnView is a monster viewer, supporting over four hundreds file formats! It is also extremely customizable and has only one drawback – it's not free for commercial use.
I know it's unfair to treat this program lightly, but I just can't tell you stories about it. This is not something that you should try, this a program that you must try, at least!
Predefined layouts, support for Adobe Photoshop plugins, audio and video built in players, rich viewing and editing features, everything you want, you got it!
What don’t I like? Oh, my, you have to pay to use this for commercial use! Even more, it doesn't have a favorites menu! This is nothing, compared to the goodies...
What do I like? The rest of it. Really, you have to like this program, at least!
Why use it? XnView is one of the most powerful image viewers out there and can compete without problems with CompuPic or ACD See.
[...]
Conclusions
Today I think we have a really close finish! To draw a quick line, I can say that XnView leads, followed by IrfanView, FastStone Viewer and Force Vision. Fresh View finishes last, but doesn't have anything to be ashamed of.