Everybody loves screenshots.
WordGrinder running on Windows 10! Full screen is supported, plus GUI controls for colour and font selection. This is using Consolas as the font.
WordGrinder running in a terminal, using the Terminus font. Unicode and italics are supported (although rxvt doesn't do a very good job of rendering italics. Or Unicode).
WordGrinder running on X11. This is the Andale Mono font, with a custom colour scheme that I like.
Distraction free full screen mode. You can turn off the status bar so all you're looking at is your text.
Look! Unicode! Plus a classic selection model using shift+cursor keys.
It may be terminal based, but it's still GUI driven. This is the built in file dialogue.
Everything is menu driven. Navigate through the menus using the cursor keys, menu shortcuts, or accelerator items. Your choice.
All menu items are reconfigurable on the fly (and the settings are saved in your document for next time). Keyboard navigation keys are just menu shortcuts, and are therefore reconfigurable. Prefer ^A to go to the beginning of a line instead of HOME? Change it while you're editing.