The Google Font Directory lets you browse all the fonts available via the Google Font API. All fonts in the directory are available for use on your website under an open source license and served by Google servers. You can use them on any non-commercial or commercial project.

You don’t need to do any programming; all you have to do is add a special stylesheet link to your HTML document, then refer to the font in a CSS style. The Google Font API is compatible with Google Chrome 4.249.4+, Firefox 3.5+, Safari 3.1+ andIE 6+. However, The Google Font API is not currently supported on iPhone, iPad, iPod, or Android.

Requirements: -
Demo: http://code.google.com/webfonts
License: Open Source License