128bit Technologies (www.macappware.com) has posted Image Smith 2.3 on the Mac App Store. The app allows you to process several photos simultaneously. You can apply name changes, image enhancements, cropping, image format changes, and more to a large batch of images.
With Image Smith you can use the pre-defined presets to scale or stretch images down to formats suitable for web banners, e-mailing photos, creating backups, and more. Image Smith 2.3 requires OS X 10.7 or later and costs $14.99.