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What is Typetester?
The Typetester is an online application for comparison of the fonts for the screen. Its’ primary role is to make web designer’s life easier. As the new fonts are bundled into operating systems, the list of the common fonts will be updated.
Typetester’s code structure is XHTML, styled with the finest CSS and driven by the JavaScript for manipulating DOM structures. Typetester will not work without JavaScript enabled.
from http://delicious.com