I wrote this, I find it spectacularly hilarious. It is a desktop text editor in a self contained html file. (50 lines)

https://text-edit.go-here.nl

You put it on your desktop and (assuming you have a browser running) instantly brings up a text editor that can only load and save.

If you feel you need some feature you edit the html file and add the code yourself. (Preferably using text-edit)

Unlimited capabilities:)