On some days, I do. But I was referred to a speed writing website by author Jim Denney, who has published such books as Quit Your Day Job! and the story of Star Trek actress Grace Lee Whitney, The Longest Trek. You can find more books by him by visiting his website, www.denneybooks.com.
I tried out this site (which is 100% free) and loved it! You type in the amount of words you want to write and select your time limit (from 10 minutes to two hours) and click the Write! button. You can also set your difficulty mode. The first is gentle and when you haven't written in a while, it gently prods you to go on. Or you can set the evil mode, which plays an annoying sound if you cease to write for too long. This is the mode I use and prefer (although some of their "evil" sounds are a mistake for me, because they just make me laugh, which makes me lose time. Once it played "Mmm Bop" by Hanson. Yes, I love that song and instead of writing I was singing along. I'm such a dork!). Or, if you want something even more difficult, set it to Kamikaze mode and if you fail to write, your writing will undo itself! Pfft! Gone!
I love this site. I think it's great and you should try it. Here's the link:
Happy (speed) writing! :D