Scrivener

Scrivener is a word processor and project management tool created specifically for writers of long texts such as novels and research papers. It won't try to tell you how to write - it just makes all the tools you have scattered around your desk available in one application. Scrivener offers the ability to edit multiple documents, a virtual index card corkboard for storyboarding, outlining, keywords, full screen editing for distraction-free composition, and the ability to export files to word processing for final formatting.