Mariner Software has turned 20—quite an achievement for a software company that started out competing against Microsoft with Mariner Write and Mariner Calc. They’ve since added numerous more proprietary programs, such as Montage, StoryMill, and MacJournal. And this weekend, the majority of their Macintosh products on sale for 40% off.

I’m beyond the point of having to explain why anyone writing a screen or stage play would want software specifically for that task. You can no more use Word to write a movie script than you can use PowerPoint to develop a website. So, the question becomes which script writing program to use, and Storyist certainly deserves a look thanks to a couple nice features that other script writing programs lack.