ThumbsUp

ThumbsUp lets you visually browse folders
containing JPEG files. All the JPEG files
in the folder (directory) are shown in a
thumb-nail format. You can adjust the image
size and view a full-size slide show.
You can automatically create new thumbnails
on an HTML page and have them be in a table
and/or anchors to the full size images.
Utilities let you delete, move and rename
your files while sorting them based on size,
date or name.