If you're a Creative Cloud or Creative Suite user, you should check out Code Line's Art View, a Quick Look enhancement that offers "quick answers to common questions."
It allows graphic designers to preview, inspect, and reveal dependent font and image files from within Apple's Quick Look preview feature. Art View works independent of other applications, so users who don't have graphics applications installed are still able to take advantage of its features.
The tool provides users with previews of design files that normally aren't compatible with Quick Look. It also provides info like what fonts, images and colors were used, and reveals dependent files.
Graphics files are visual by nature. By expanding the types of files that can be seen in Finder windows, dialog boxes and other applications, Art View helps improve the workflow of designers and people that work with them.
Art View is available as a free, 15-day demo and is available for purchase online. A single-user license costs $24.95. Art View requires Mac OS X 10.7 or later. For more information visit Code Line's website.