Top vote goes to Irfanview <a href="http://www.irfanview.com/" target="_blank">http://www.irfanview.com/</a> for viewing images in just about any format.
Mario Knok's IconSaver saves/restores Desktop icon positions (look for it with Google)
eCleaner by Steve Chin is good for clearing the HTML out of Web pages (ditto).
Good thread - several more haunt my machine that are invaluable every once in a while - I'll try and get them together.
Cheers