Mudbug Software (http://www.mudbugsoftware.com/ ) has introduced
Webify 1.0, an image editing utility for Mac OS X 10.5 ("Leopard").
Serving as an image browser, Webify was specifically developed as a
productivity tool to help prepare images for the web.

With it you can resize, scale, rotate and flip many images at once
and save them in JPEG, JPEG 2000, PNG, PDF, PSD, or TIFF format. By
leveraging the power of Core Image filters built into Leopard, users
may alter the Exposure, Gamma, Saturation, Brightness, Contrast,
Sharpness, and Sepia of images in batch or one at a time. One of
Webify's features is its ability to flip images on the XYZ axis.

Webify is Universal Binary so runs natively on both PowerPC and Intel
Macs. An US$20 single user license covers personal use on a one
computer. A demo is available for download.