I'm holding my own version of Inktober in the upcoming month of October. If you don't know what Inktober is, it's basically where an artist draws something that follows the given prompt every day. I'm not sure if this is a reknowned thing on Newgrounds, but if you would like to join me you may. Basically expect artworks every day for October!
I know there is the official list but I do not support the guy who made it because he plagiarised someone else's book.