For those who are interested in adding watermarks to your images...the following is a pretty cool resource...
http://picmarkr.com/
Instead of tracking down some misc freeware, or purchasing programs...just hop on the above site...upload your pic, watermark it, download it, and call it a day! It has its limitations...however if you're not computer savvy, or if you're procrastinating over which program to DL/buy...then this is a good substitute.
They offer three watermarking options. Each option only requires you to go through three simple steps (this includes step 3 which is downloading your (then) watermarked image).
1 -
Text watermark - Unfortunately, one is not able to customize the text size. Choose this option only if you're watermarking relatively small images...
2 -
Image watermark - Upload your company logo or any other © symbol...and vuala...
3 -
Tiled watermark - IMO, this is Overkill but some might find it appealing
...
I'm sure there are other (more advanced) sites that offer this service...however, I just ran across this one and figured its worth sharing.