TitanJeff,
Do you use a Font Manager program (like Suitcase Fusion, FontAgent Pro, Font Explorer X Pro, etc)? If you do, then most of them can print a catalog of the fonts that you have (both active and inactive fonts). If you don't use a font manager, there are some programs that only do cataloging but I'm not sure if any of them are free. There are a couple in the App Store but I didn't see any free ones. If you have and use a lot of fonts, a good font manager isn't a bad investment to make (plus it will do cataloging for you).
Mecha