TSR Watermark Image software, is a free program for personal use that can add digital watermarks to all your images, photos and pictures with the transparency you decide. The program can also resize the images before the digital watermark is added.
* Fixed a bug where the watermarked photos would not be saved when using tif images, thanks Steve!
* Fixed a bug where the relative offset of the watermark was not saved to the setup file, thanks Bobby!
Product page: here