Flipping Typical – a new way to explore the popular typefaces you have on your computer, project by Stuart Robinson.
Designers don’t have to rely on the most common fonts like Arial, Verdana or Times New Roman. Since increasing number of users have modern PC with new operating system / applications, they may very well have a wide array of other common fonts in their machine and supports in Firefox 2+, Safari 3+, IE7+. OS/X, Opera 9.10.
Here is another version presented by Johan Sundström in a more interesting and cool layout here. It found 55 popular fonts in my system, go and check whether you are using popular fonts in your system or not and let me know how many you found :)