Is watermarking worth it?
Are you concerned about image copy protection being a photographer or website owner? Are you interested in image watermarking software? If so then which one do you use?
IMO, Watermark does very little to protect your images, unless you make it so hideous and ugly that it ruins the very image you want to protect.
Whenever I want to add watermark, I don't use a special software. I just use Photoshop.