Photo Renamer allows you to view photos in the chronological order, even taken from different cameras. It does this by changing the photos' filenames.
Photo Renamer will not touch your original photos. You keep them. Instead, it copies the photos and places them in a separate folder. Photo Renamer also works on JPEG and TIFF digital photos, features Economy Mode to avoid slowing other jobs down, optional suffix appending, full subfolder support, and different ways of rendering the date & time. It also includes a cursory help file.