Here are the tools I use, ordered for importance. To me, "important" means: "how I make my living."
WPengine and WordPress - at the end of the day, I make money from my words. It's where I've built my reputation.
Digital Ocean - all my apps and coding projects are deployed here. I like it way better than Heroku.
ConvertKit - my newsletter is where I build relationships, and earn trust. This is where I'll share what I'm learning, and ultimately ask people to buy.
Podia - Podia is an all-in-one selling platform for solopreneurs. It's where I sell my digital products: downloads, courses, and books.
ScreenFlow - I believe the future of my business is in video + video courses. I'm in ScreenFlow almost every day. Sometimes I use it to "hijack audio" during interviews. Sometimes I use it to edit video. It's getting a lot of use.
Reedsy - after trying iBooks Author and Pressbooks to write my books, I've finally settled on Reedsy for writing, layout, and publishing of ebooks.
Transistor - my podcasts have been one of the biggest ways I've built authority and reputation. Transistor is dead simple, and has great analytics. Plus, it's cheaper than what I was paying Amazon S3 to host them!
Those are the big ones. I'll continue to add / modify this list as I think of other things.