I've used Smooze [1] in the past. It has a ton of features, but I really just need it for turning off mouse acceleration and making the scroll wheel usable. Glad to see an open source option. [1] https://smooze.co/. - Source: Hacker News / 12 months ago

Smooze is the best app I have found to make using mac with a non-mac mouse even remotely usable. Really wish Apple would care a little more about mouse support. Source: about 1 year ago

Mac unfortunately isn’t the best at supporting third party mice and their additional buttons, for your specific case, the only app that I know of that offers a similar option would be smooze. Source: about 1 year ago

What mouse are you using? - SteerMouse is a nice app that can remap buttons. - Smooze I think also had some options for buttons. Source: over 1 year ago

Hey guys, I've recently added some trackball improvements to the grab scroll feature in Smooze Pro and I'd love to get some avid trackball users input on this. Source: over 1 year ago

I guess I'll pass it forward with a recommendation of WizMouse, a tiny background application that lets you scroll windows you mouse over them without selecting them which is great for stuff like looking through a reference in a browser while typing into another application like when writing a paper, checking documentation while coding, etc. It's been around forever and I feel like a lot of people don't know of... Source: almost 2 years ago