Firefox add-on that displays progress during National Novel Writing Month
Version: 0.7NaNoWriMo Meter for Firefox is a Firefox extension that helps you track whether you're on pace to reach 50,000 words by the end of National Novel Writing Month.
Operating System: Mac OS X
After you restart your browser, you should see a new bit of text in the lower-right of your browser. Click on the text and enter your current novel word count.
Nanowrimo Meter will then calculate how many words you're likely to have by the end of November, given your current rate of writing. If you wait and watch it for a few minutes, the number will go down. That's because you're messing around with web toys instead of writing!