Storyist provides the word processing tools you export from a top-notch creative writing application, including spell checking; smart quotes processing; annotations; and support for headers, footers, and style sheets. And Storyist comes with manuscript and screenplay templates so you can focus on the writing, not the formatting.

Word Processor
Full-featured word processor with support for headers, footers, and style sheets.
Page layout view that supports 2-up and mirrored pages.
Automatic manuscript and screenplay formatting with Quick Styles and Smart Text.
Text Inspector for quick editing of formatting, style, and page settings.
Support for comments and bookmarks.
Automator Action-based text plugins that extend Storyist's functionality.

Story Development Tools
Corkboard with support for photos and index cards.
Collage view to visualize the relationships between your story elements.
Flexible, color-coding outliner.
Customizable plot, character, and setting sheets

Project Manager
Project view to keep all your writing organized and accessible.
Import and export support for popular file formats, including RTF, .doc, .docx, Final Draft, and more.
A project trash lets you keep "discarded" items around until you're sure you don't need them any more.
Automator workflow support to handle routine import and export tasks like smart quote conversion and style replacement.

Requires Mac OS X 10.4.11 or later

WHAT'S NEW
Storyist 2.3 adds Kindle export, a theme manager, and several interface enhancements. Specifically:
Kindle Export: The exporter can now create Kindle editions of your project for reading on your Kindle and publishing on Amazon.com. (10.5 and later)
Theme Manager: A new theme preference pane allows you to change interface fonts, colors, and background patterns, so you can customize the look of your project. In full-screen mode, you can even specify an alternate font color.
Enhancements and Bug Fixes
The navigation bar background color now changes to reflect the active split view, making it easier to see which split is active.
The main window scrollers now use the iTunes gradient appearance to better match the navigation bar when selected.
VoiceOver navigation has been enhanced.
Typing lag no longer increases significantly for 10-15 seconds after an hour or so of writing. ”