watermarking photos

Is there a plugin to watermark a small number of photos within the WP admin?

I have found several plugins (such as NexGen gallery) which are great for watermarking a large number of photos. But at times I only want to upload one or two photos, and it seems like a pain to upload them into NexGen then into my post. At the same time it’s a nuisance to open photo editing software on my desktop and use that to watermark the photos.

Ideally I’d like to be able to watermark the photos within the “new post” page. From what I’ve learned, it seems that the old Scissors plugin worked pretty well at that, but it does not work beyond 2.7 or so and I am running 3.0.

Thanks!