Watermarker 1.3 (Mac App Store link) gives you a way to solve this problem by superimposing a mark of your choosing to an existing picture, thus “stamping” with your particular imprint.

I’m a bit behind in mentioning it, but Watermarker 2 is out. This Mac app from developer (and former MacStories writer) Don Southard lets you quickly resize and add professional watermarks to batches ...

WaterMarker "A" In 2019, the first marker was installed in Milwaukee’s Walker’s Point neighborhood. A red, acrylic, five-feet-tall letter was erected atop an aluminum pole in front of Acosta ...

Bronson Watermarker fills a small--but vital--niche for those who need to create watermarked PDFs and images. You can even export your files as a single image to make sure that someone can't strip ...