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.
...time<br />This review was originally posted on VersionTracker.com.<br />In concept, this is a very useful app, but it suffers from an annoying bug of ignoring any font settings. No matter what's selected in the "Fonts..." dialog, the preview always shows the signature as black Helvetica 10 point. (OS X, Intel iMac, Snow Leopard 10.6.3)