Typechart lets you easily browse through and compare fonts. It will also let you compare how the fonts are rendered in Windows and Apple.
TYPECHART lets you flip through, preview and compare web typography while retrieving the CSS.
Click here to check it out.

Flipping Typical is a way to explore the popular typefaces you have on your computer. You can type in the text you wish to view and see it in a number of different fonts that you have installed on your computer. I use the font viewer when I need to match a logo font or [...]