Photo Mechanic
Photo Mechanic from Camerabits
http://www.camerabits.com/
The version shown in this tutoral is 4.6.x -- (version 5 is now available).
Available for both Mac and Windows.
Photo Mechanic Overview
Photo Mechanic is an image browser designed to take advantage of advanced features in the more recent Microsoft Windows and Apple Mac OS X operating systems. Photo Mechanic requires Windows Vista,Windows XP, Mac OS X 10.4.11 or later. Its software footprint, however, is light enough that it can run adequately on many of the smaller netbooks (the new ultra-small laptops).
The primary users of Photo Mechanic have been newspaper and sports photographers, although others who need a very fast way to browse and annotate images have jumped on board, as well. Photo Mechanic fits into the class of applications referred to as browser or annotation software. Have no doubts: This application is a first-class image browser that can rapidly add metadata to images.
Photo Mechanic displays JPEG, PNG, TIFF, PSD, DNG, and a wide variety of Raw files, as well as various movie formats (AVI, MOV, MPEG4, etc.). GIF and TGA still formats can be viewed with QuickTime software also installed. It can embed IPTC and XMP metadata in JPEG, TIFF, PSD, DNG and a wide variety of Raw files.