edjpgcom is a free Windows application that allows you to change (or add) a JPEG commment in a JPEG file. That's all it does. All other fields in a JFIF or Exif file are left untouched. It even keeps the filesystem timestamp! It's based on the rdjpg
Program to pull the IPTC (Photoshop) information out of various types of digital camera files. This information can coexist in files containing EXIF data.Manufacturer information is provided for Canon, Casio, Fuji, Nikon, and Olympus cameras.