My current hands-down favorite is the oddly named Write Monkey.-40hz
I tried WriteMonkey ("WM") a year or so ago, but found it to be too 'odd'. Your praise made me give it another try, but once again it failed to please me. I made myslef acquainted with the strange GUI, and I accepted the various
features, I guess you must call them. And I thought, okay, I can live with that, this could work for me! Then I told it to start with Windows, and restarted my XP to see how WM would perform at startup. At start, a message box popped up and told me that 'null' was missing, and all of my text was deleted and I had to start all over with a blank page.
It seems you have to gently close this program, before shutting down the computer? I didn't, and I won't. I just told XP to close, and left WM open. And because of this (?) the text was deleted. I find such a behaviour unacceptable, given WM has 'auto-save'.
I was also sadly surprised that I was not given the option to change a single hotkey - on my machine F12 will close down the computer.
I did find find some features about WriteMonkey that I like. Nevertheless it will now leave my PC.