I discovered scribe "https://www.producthunt.com/prod..." It's absolutely amazing! You can create and document any process through a step-by-step guide, in minutes! It's very useful for new employee onboarding etc.
I feel like a dinosaur saying this, but Notion. I've used it before, but didn't really appreciate it's full capability to be a Company Operating System platform until early this year.
ChatGPT and PrioriTab. Its a chrome extension that helps you maintain a checklist. Sounds like a very simple tool but super important if you work involves most on a browser.