FontDoc shows you all fonts on your computer, or uninstalled fonts. You can use any text and any size. No more looking at tiny WYSIWYG font lists or clicking on a font to see its appearance. FontDoc simply generates a Rich Text document with samples of all your fonts. It can be saved or printed for future reference. Font Book is still not able to do this 15 years later. Dear Macdom denizens, enjoy.
Note: Now requires OS X 10.10 or later