Hoefler & Frere-Jones posted a great tip for Leopard users. In case you didn’t realize, you can preview any file quickly by selecting it in the finder and hitting SPACE. This works for images, documents and, it seems, also for fonts. The coolest part of this trick is that if you select a family of fonts, you can view them all at once. There’s even a slick animation.
Shown above is Diavlo, a great, free typeface from Jos Buivenga. Check out his site, there’s quite a few great, free fonts available.