Corel's office suite has a scripting language if I recall. My grandfather in law learned enough of it to develop a few systems for managing family finances, gifting (it's a large family), etc.

Emacs is notable. It requires learning a bit of elisp programming but, like a browser, is basically a development environment that gives you access to a windowing system, input from the user, image rendering, text buffers, etc. Plenty of people write their own tools to manage particular workflows.

Update

Examples of emacs as folk interface:

- https://bofh.org.uk/2019/02/25/baking-with-emacs/