Nanowrimo was a catalyst for Beamish Boy. In a talk given by Albert Flynn DeSilver, we discussed briefly after the event how many other bestsellers stemmed from Nanowrimo. He pointed me to the stories available at https://nanowrimo.org/pep-talks - as of today, there are 88 essays to inspire you to write! Did you know The Night Circus began as a Nanowrimo effort? Read the background here.
Here's a little word count widget:
What appeals to me about Nanowrimo is the fact it's a 30-day challenge. You are in a community of other 'players' with a shared objective. There's even a leaderboard