Drew Hamlin Software has released
Typeset, a Mac OS X utility for creative professionals who need to view collections of installed fonts and compare them. It’s available for download and costs US$19 to purchase.
You can flag fonts of particular interest, display more details about fonts including copyright and version information and find fonts on your hard drive. You can also use Typeset alongside Apple’s own Font Book and Font Panel application to install and activate fonts, set up collects, compare them side by side and more.