It seems that there’s now a wide range of software for writers out there on the Mac
- Scrivener from Literature And Latte (US$34.99)
- Montage from Mariner Software (US$139.95 download)
- Writer’s Cafe (US$45 or US$34 for students)
VersionTracker also lists
- Movie Outline
- Storyist (US$59)
- SuperNoteCard for Scriptwriting (US$34) from Mindola