frame4zoom is designed to make it easy to add borders and a signature to jpeg images. It can process a single file or a whole directory. Several options are available to limit the size of the output file while maintaining the quality of the original image.
Adobe Photoshop Camera Raw 5.7 plug-in release candidate on Adobe Labs. The Camera Raw plug-in provides easy access within Photoshop to the raw image formats produced by many leading professional and midrange digital cameras.