Which programs leave traces like Word, Photoshop etc. in files created with these programs?

Which programs leave traces like Word, Photoshop etc. in files created with these programs? I was just wondering whether programs like MS Word, Adobe Photoshop and so on leave traces in files we create with them. By traces I mean things like:
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Guest [Entry]

"Unfortunately, quite a few programs stick some data in there for branding or informational purposes. As far as I know, no real filetype is immune. Photoshop sticks monitor inforation and color profiles inside of PNG files when you save them, and Paint.NET sets the software text block in a PNG file to the version of Paint.NET you used. What's worse is it can be difficult to find out too.

When you check the summary tab for files, I believe any of the information below the file group is generated by Explorer on the fly, so the Owner is who's set as the owner via NTFS and the Computer is showing which comptuer the file is currently located on (for network shares)."