If you haven't heard of Ommwriter before, it takes a slightly different approach to distraction-free writing. Instead of merely being a full-screen text editor, it adds relaxing backgrounds and peaceful music or ambient noise to the mix, to not only keep you focused on your writing but keep you relaxed and productive. It comes in two versions, a free version and a paid version that comes with extra backgrounds and audio tracks. Check out the video above for a demonstration, and hit the link to download it and try it out now.
Ommwriter is a free download for Windows and Mac OS X, though you can donate any amount you want for the more fully-stocked version.