Oh yes. This is the one you want.

The best tools are simple. The interface is so tidy and clear that it BEGS you to START writing. Slugline AUTOMATICALLY puts your work into standard screenplay format. There are no extra features to procrastinate your time away. All you see is your screenplay and (if you choose) a helpful script outline. Initially, I was scared off by the price. I downloaded the trial version, saw the magic, and bought it. Easily worth it for me because of the amount that I use it.

It makes sense to me to spend money for a nice mattress, a good kitchen knife, and, if you have a screenplay to write, Slugline.

nemo dally about Slugline, v1.0.9