WinWatermark is a very good choice to add watermarks to your digital pictures. It works accurately and it takes no more than 2 seconds.
WinWatermark allows you to add a watermark, no matter if it is text or an small logo. If it's text, change the font, size and color, if it is a picture, use your JPG, BMP or ICO files to watermark your creations.
The feature that makes WinWatermark to be better than any other watermarking program is that one that allows you to fully personalize your watermarks by choosing the place and orientation of them as well as the transparency level.