I was looking for a program that would create just thumbnails and only thumbnails (not complete gallery pages). This is just what I was looking for. The sharpen feature is great because it makes the thumbnails look way more appealing.

The only thing I wish it had was the ability to make thumbnails with a fixed height & width, cropped to fit the exact proportions without stretching (I love the look of thumbnails with uniform size) and the possibility to add borders to the thumbnails.