Scrivener is a project management tool for writers. 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.
Focus on Writing
Scrivener provides access to the full power of the OS X text system - so you have total control over your text.
Add tables, bullet points and images and view your text however you want.
Corkboard
In Scrivener, every document is attached to a virtual index card onto which you can jot a synopsis.
Use the corkboard to shuffle these index cards around - which is instantly reflected in the structure of your draft.
Outline
The outliner is another way of viewing the synopses and meta-data of the documents in your project.
Restructure your work easily; get an overview of the project so far and what still needs to be done.
Refer to Research
No more switching between multiple applications just to refer to your research files!
You can keep all of your research right inside Scrivener.
Smile -You Have Snapshots
Never be afraid to make mistakes. Scrivener's "snapshot" feature makes it easy to return to an earlier version of your text.
Full Screen -Evolved
Scrivener boasts the most advanced full screen editing mode out there. Fade the background in and out, choose the width of the "paper" and get writing.
Export
Finished your masterpiece? Now it's time to get it "out there". Export to any major word processor, including Microsoft Word, Nisus Writer and Mellel.