Title pretty much says it all. I have a folder filled with many images and it would be handy to get a list of all the tags that are used so that when I'm adding new images I can reference that list to make sure I don't miss a tag that would be applicable. Is there any way to do this?
Windows Live Photo Gallery from Windows Live Essentials seems to do the job.
See the article Working with digital pictures.
Some more possible (free) products are :