Linotype's taken a page from Apple's iTunes experience and they're offering the font manager for free with the addition of a font storefront built-in to the application.

On the up side, it's an excellent font manager. There is no longer any excuse for using Font Book (yeeech!) given that this program's out there and it's free. It manages large sets of fonts without barfing (I'm looking at you, Suitcase!) and is fairly flexible in how a user wishes to manage their fonts (i.e. organize them yourself and import them for activation, or manage them entirely within Font Explorer's confines).

The font store is great. It's a fabulous way to browse fonts, and it even lets you type samples in the store's font in whatever colors and size you care to view it in. That's the best font preview I've seen anywhere, bar none.

The same previewing is available for your own fonts, and it's just as fast and useful as FontAgent or Suitcase.

Plug-ins are provided for auto-activation, and it can also intercept "generic" font calls from other OS X applications. Better still, you can enable/disable this function in applications of your choice. (Nice to keep MS Word's font cache from getting out of control.)

Only thing it doesn't do that FontAgent Pro (my gold standard of font management) does is detailed reporting and repair of fonts. It will mark a font as bad, but that's it. FontAgent does a great triage of your font library.