The program takes up the entire screen, letting you see only its interface and nothing else.
Focus Writer is free, multiplatform, and open source. With it, you can see live data including the number of words and characters written, dictionary support, tabbed organization, and the ability to set daily goals.
One of the most interesting features of the program is the ability to customize the appearance of the writing section, including changing the background, adding images, or choosing what font you use.
If you're looking for a text editor that focuses solely on writing, Focus Writer is for you.
And, with this version, you can take the program anywhere on any portable storage device, without losing your settings or having to install it.