We originally started writing our script in Apple Works (Once known as Claris Works), a good program even if it was discontinued years ago; however, after 5 years of formating scripts myself, I have decided it is time to make the leap to script software. And not just script write software, but a project manager. We have decided to move to Celtx for our next draft, and to manage the project. I am excited about it; I have known about Celtx for a while now, just not had a good chance to use it. Makes lists, holds scripts, helps format and write scripts, makes schedules, etc. I will let you know how it works for us as we go along. Check out Celtx here: www.Celtx.com
Oh, it is free, and it is made by Canadians to boot!