Wikipedia's entry for the ZX81:

https://en.wikipedia.org/wiki/ZX81

WordPerfect in many of its forms, complete with download

links:

https://winworldpc.com/product/wordperfect/3x-dos

Hog Bay Software's WriteRoom for Mac:

https://www.hogbaysoftware.com/products/writeroom/

FocusWriter:

https://gottcode.org/focuswriter/

How to turn Vim into a word processor:

https://www.maketecheasier.com/turn-vim-word-processor/

Hunspell:

http://hunspell.github.io/

The GNU Emacs site:

https://www.gnu.org/software/emacs/

GNU aspell:

http://aspell.net/

Flycheck for GNU Emacs:

https://www.flycheck.org/en/latest/

Help for sufferers of RSI:

https://www.rsiprevention.com/

enistello can be reached by email:

Or on Mastodon:

@[email protected]