Free digital watermarking software?

Anyone know of any free software to watermark digital photo's? I have little-to-none knowledge in this area, buy have a picture happy girlfriend who wants to watermark stuff she takes at public events.

.....why would one what to watermark pictures?

Can't you do it with Adobe Acrobat?

UniDream PowerBatch (http://www.nonags.com/freeware-unidream-powerbatch_1317.html) will work.

Anyone know of any free software to watermark digital photo's? I have little-to-none knowledge in this area, buy have a picture happy girlfriend who wants to watermark stuff she takes at public events.

Is she posting them to a Wordpress blog? If so, there's a plugin that will auto watermark photos along with posting them (as a gallery) in wordpress posts.

You can watermark on Photoshop, no?

Thanks, I'll have a look through some of those suggestions, UniDream should work. As for photoshop honestly though I haven't used it in like 10 years, I'm strictly a MS Paint guy. My girlfriend being an amateur/hobbyist photographer has had people take her photo's in the past, not really upset by it but kind of annoyed on the principle of it all, and since I'm her geek I need to figure this out.

And of course doing a google search for anything 'free' generally doesn't work, as you have to sift through a lot of unrelated junk and not-free stuff. Better to ask the question in the right place.

Thanks, I'll have a look through some of those suggestions, UniDream should work. As for photoshop honestly though I haven't used it in like 10 years, I'm strictly a MS Paint guy. My girlfriend being an amateur/hobbyist photographer has had people take her photo's in the past, not really upset by it but kind of annoyed on the principle of it all, and since I'm her geek I need to figure this out.

And of course doing a google search for anything 'free' generally doesn't work, as you have to sift through a lot of unrelated junk and not-free stuff. Better to ask the question in the right place.

If you have photoshop already watermarking a photo would probably be really easy.. just past your picture in, add text, change opacity on text.. done :).