Typechart lets you flip through, preview and compare web typography while retrieving the CSS.

You can view different typefaces with different font sizes and emphases. One of the handy features is that you can compare Windows rendering with Apple font rendering.

You can also download the CSS code for a specific typographic style, cach style corresponds with a style ID, which allows you to annotate prototypes and retrieve the css while coding as well.

Requirements: -
Demo: http://www.typechart.com
License: License Free