FontBook

FontBook is an Adobe air-based application that offers you a simple way to view all fonts installed on your computer.

The interface of the program gives you easy access to any font, you'll only have to click it.

Then, change color, size or separation to check if it is the one you want or continue searching.

FontBook can be really useful if you are designing or writing something and you need different fonts but you don't want to change fonts once and again to check results.