Sometimes you need to see what your fonts look like, and waiting for the preview in Word or Illustrator is just too slow. Try STC fontBROWSER (Flash). It lists all the fonts that are installed on your computer and gives you a quick preview at two different sizes.
There are other browser-based font viewers, I learned, with pros and cons to each. Read about them here.
I found this interesting:
note: How does a web app interrogate my fonts?
In a word: Flash. Most of these systems use a Flash applet to retrieve font names — even if the interface is primarily HTML.