Nick Moore is a Mac developer who makes small utilities such as Scroll Reverser, PopClip, and Dropshelf.
Commenters recommend his tools: Scroll Reverser for separate mouse and trackpad scrolling, and PopClip as a useful, extensible text-selection tool.
MacOS utilities I rely on:
-- Typinator - text expander / autocorrector - https://www.ergonis.com/products/typinator/
-- Keyboard Maestro - indispensable macro program - https://www.keyboardmaestro.com/main/
-- PopClip - use this 50 times a day - https://pilotmoon.com/popclip/
-- HazeOver – dims inactive windows/monitors – https://hazeover.com/
-- Paste – clipboard manager - https://pasteapp.me/
-- ScreenFloat - screenshot app - https://www.screenfloatapp.com/
-- Spectacle - window manager https://www.spectacleapp.com/
-- Window Tidy - another window manager (I use them both) - https://itunes.apple.com/us/app/window-tidy/id456609775?mt=12
-- Dash - developer docs browser - https://kapeli.com/dash
-- Cold Turkey - Internet distraction blocker - https://getcoldturkey.com/
-- Bartender - https://www.macbartender.com/
I mean I use rectangle, and used spectacle before it, and I’m very grateful to the developers for maintaining it and making it available for free, but this really should be part of the OS and I will be very happy to get rid of that app after updating to Sequoia.
I also use an app that reverses the scroll direction of an attached USB mouse, without affecting the (natural) trackpad scroll direction, because MacOS does not allow changing them independently (looks like they are separate options for mouse and trackpad but they are in fact the same).
The App is called Scroll Reverser [1] it is free and works flawlessly, but it really should not have to exist, it’s ridiculous.
[1] https://pilotmoon.com/scrollreverser/
I dunno, I have tried it, and it was ok after a bit on the touchpad.
Then I plugged in a mouse. Did not work at all. I could not use it like that. So now I have scroll reverser[1] to scroll that way with just the trackpad. But really, I was flipping back and forth with the settings (there was something weird with the back/forward swipes for browsers) I don't even know which way it is right now. But it doesn't matter, as soon as I start moving it I can get feedback and do it correctly.
So I can get used to having it flipped on me rather quickly. I might make some false starts.
[1]: http://pilotmoon.com/scrollreverser/
PopClip https://pilotmoon.com/popclip/
Spectacle https://github.com/eczarny/spectacle
Alfred 4
Bartender 3
Fantastical
RunCat
ControlPlane
Mindful Mynah
Audio Hijack
SSH Proxy
VOX
Clearview
Skim
Dash
Hopper Disassembler
Pacifist
Suspicious Package
Vienna
XLD
Mactracker
IINA
iChm
Hocus Focus http://hocusfoc.us/
Entropy http://www.eigenlogik.com/entropy/
Clipy https://github.com/ian4hu/Clipy
https://github.com/the0neyouseek/MonitorControl/
http://tracesof.net/uebersicht/ sorry but Node included in this one :)
Looks somewhat similar to Popclip[0], but is less intrusive(user needs to be explicit) and more visual(result is shown below).
Very interesting solution for text manipulation. (A bit off topic but...) Seeing these tools which primary interaction happens with the clipboard make me think that the GUI equivalent of UNIX pipes is the clipboard — it allows programs to interoperate in an unstructured fashion.
[0]: https://pilotmoon.com/popclip/
[edit]: fixed typo & changed some words to convey my meaning better.
(I have not tried either of these solutions, so I'm not sure if they actually work.) Although still separate applications, Karabiner and Scroll Reverser are both free. (I mention this since you stated having to "pay for an app".)
(1) Karabiner: https://pqrs.org/osx/karabiner/ → Cf. Kellen Mace, "Separate Trackpad & Mouse Natural Scrolling in Mac OS X" (2014) https://kellenmace.com/automate-trackpad-mouse-natural-scrolling-in-mac-os-x/
(2) Scroll Reverser: http://pilotmoon.com/scrollreverser/