I won't do your research but the areas you may want to explore are:

1. EXIF editors (too many out there for me to tell about)
2. Contact Sheet creation.

http://www.faststone.org/FSViewerDetail.htm for instance notes it's contact sheet creator and IRFANVIEW should be looked over to see if you can achieve your effect from the EXIF comment to where you want said text.

Happy searching.

Bob