"Helmlet" lets users close a Macbook's lid without its going to sleep- even with no external monitor connected- for a mere €3.99. No subscription!

https://helmlet.app/en/

Sublime Text, BusyCal, Logic, Affinity, NetNewsWire, TablePlus, Transmit, Zotero, Mac Mail, Cakedesk.

Let's flip it: Do you have some examples of software needed that is not available as a regular install for MacOS? Not saying it doesn't exist, but you can almost always find high quality local software.

IA Writer, IA Presenter, everything from Omni Group, Acorn, Procreate, Capo, Sketch.