From Veenix Technologies:
Veenix TypeBook Creator allows you to easily view, create, organize and print type specimen books and font sample sheets of all your fonts, whether they are installed and active in your System or just sitting somewhere on a hard drive. TypeBook Creator uses Veenix's powerful GlyphLogicEngine technology to analyze font characteristics and automatically organize your fonts by font energy-color as well as into 16 different standard font classifications: text fonts, sans serif fonts, serif fonts, picture, script and thematic fonts, monospaced fonts, fraction and expert fonts and more. TypeBook Creator offers 17 classic specimen page layouts and numerous easy to use customization and categorization options, plus NEW "Quick Mix Suggestions", which suggests alternative or similar fonts for any font in your database.
This review was originally posted on VersionTracker.com. If you DON'T care much about categorizing your fonts, TBC 1.9.2 is BY FAR the best font book app I've found. Fast, stable, customizable and works easily with both installed and uninstalled font files.
However, there is ONE major problem with this app that makes it virtually useless to me: the categorization feature. First of all, there are only 6 custom categories (and another dozen "standard" ones that you can't rename or delete). Plus, it's unnecessarily difficult to apply a category to a font. Instead of a drag-and-drop feature (a la Address Book or Mail or any other standard Mac app), you have to open up a window and manually select the category(ies). And if you want to apply a category to a bunch of them, instead of selecting multiple fonts from the list, you have to click a checkbox next to the font, and then go to the menu to select "batch categorize".
That may not seem that big a difference, but when you're trying to sort THOUSANDS of fonts, it gets a bit annoying.
Finally, the categories are meaningless outside of the app. You can't use TBC apply tags to the font files for a Spotlight search, and you can't export fonts from a category to make a new folder of fonts for Suitcase or another app.