What free and simple software can I use to batch watermark my photographs?

Question: What free and simple software can I use to batch watermark my photographs!?
Best Answer - Chosen by Asker:

batch watermark set of photos
uMark Lite
http://www!.uconomix!.com/Products/uMark/D!.!.!.
epowersofts jpeg exif stamper
http://www!.epowersofts!.com/jpegexifstamp!.!.!.
kigo image converter
http://www!.kigosoft!.com/kigo-image-conve!.!.!.
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