I have looked at applications that help you write without distractions, like WriteMonkey and the cloud-based QuietWrite. But they have their limitations. WriteMonkey, Q10 and other distraction-free writers save the text in a .TXT file, which many people may not like.
You can turn Word into a distraction-free writing app too, using a simple add-in called Writespace. You get the typical black-background-with-text interface, coupled with the advanced spell-check and other Word features.
You just go to this website and download the installer. It guides you through a simple setup. It integrates with the latest Office versions as well as Office 2003.
It's a perfect add-in if you are looking for the perfect distraction-free writer that saves in Word formats and has advanced Office features as well.