Icemark for Mac keep your photos, artwork or other types of images protected from illegal use by stamping it with safe and protective watermarks.
    Prevent others from unauthorized access to your personal photos, images, or other types of artwork by protecting them with an invisible watermark. A simple to use tool helps you to quickly and easily create invisible watermarks that are detectible only by having the key. The key features supporting the tool are: it supports images in JPEG, TIFF, BMP, PNG, TGA, RAW, JP2, JPC, or PCX format; quickly searches your watermarked images, watermarks are impossible to be removed, faster batch processing, changing or distortion of watermarked image is impossible, watermark intensity is configurable, watermark detection can be done without the original image, and the program is written in C++ for speed and accuracy.
    The best feature of Icemark for Mac is that it allows you to watermark images as small as 40 x 40 pixels.