I've been a trackpad proponent for years, but with Steermouse I've been able to dial in my MX Master so perfectly that I find myself missing it when I travel.

What really took it to the next level for me were adding chord mappings. For example I can hold right mouse button + scroll the thumb wheel to adjust volume. So convenient!

This is my favorite. It Just Works with every mouse I throw at it and supports a ludicrous amount of button customization.

Not being open source is the thing that the program in the article fixes. You want the goal of the software-writer to be producing a good tool, not using the software as a means to turn a profit. That's how you get the turd being replaced by the tool in the article