FontAgent Pro!

Font management software. Search, preview and activate fonts. Detect and correct corrupt fonts. Suitcase Fusion is an early adopter too with seamless auto-activation support for Adobe InDesign, Adobe Illustrator and QuarkXPress.

Font Book is the standard font manager that comes with Mac OS.

If you have a large collection of fonts, keeping them all in your Windows Fonts folder can be burdensome and slow. With Font Runner, you can manage your font files by keeping them in folders of your choosing. Browse through your font collection quickly to help you find “just the right font” for any project. Organize your fonts with drag-and-drop ease; cataloging them into different folders and projects. Search your fonts by name, similarity or by character. Also, preview your fonts inside Font Runner or by making them available to other applications. Finally, Font Runner gives you the ability to make printouts of your fonts so you can thumb through them easily. You can do all this — without putting your fonts in the Windows Fonts folder. »

Fonty allows you to scan all the installed fonts on your Mac and lists their character support. Fonty comes with some predefined character sets for some common languages and groups of characters.