According to Jim Stewart :
I'm looking for some simple and hopefully free
software that can take a group of image files,
create thumbnails of them and create an http
page that will show the thumbnails and load the
big image when the thumbnail is clicked.

I can provide you one, assuming certain conditions are met:

1) It needs to be a unix system, as this is in the form of a
shell script.

2) You need to have the same additional (free) tools installed
for extracting information from the images, and for resizing
them on the fly.

It actually provides three sizes -- the thumbnail, a reasonably
sized image, and, instructions in the beginning of the web page to allow
you to get the original full-sized (too large for a normal web page)
image.

Enjoy,
DoN.

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