I know the widely used are EverNote, Notion, Obsidian, OneNote, Jolin and Goodnotes.
I personally use OneNote.
I use Joplin extensively.
Having tried several over the years, Agenda is a keeper, and with an active, focused development process it keeps getting better. DEVONthink is my very well cross referenced document manager.
Obsidian and Logseq are great choices, especially if you’re into the whole knowledge management game. I’ve dabbled with them myself and found them pretty intuitive. But if you’re looking for something a bit more ephemeral for those quick meeting or class notes, have you checked out NotesOnline?
Here’s the link if you want to give it a whirl: https://notesonline.com/. It’s this nifty online service that lets you create anonymous notes which self-destruct after they’re read. It’s like digital Post-its on steroids. Plus, the anonymity aspect adds an extra layer of privacy, which can be handy.