I like rnote. It's not super feature-complete, but it's still really nice to use. Has an infinite canvas to write on, pretty clean UI/UX, has no problems taking my wacom tablet as input.

Etherpad https://etherpad.org/

How has no one mentioned Rnote ?
It has good drawing, selection and other stuff with an infinite canvas while being pretty configurable.

Logseq has whiteboards and in-note drawings

I was deeeep in the OneNote eco-system. I forced myself out of it and spent a lot of time finding the best alternative so I can save you some time: The answer is Obsidian.

But to get to even 60% of what OneNote does, you need a fair amount of plugins, which lowers stability somewhat and, having tried the three biggest sync systems, you might as well go straight to paying for their sync. The self-hosted sync options do not work reliably.

Obsidian is a great alternative. A plugin called obsidian_ink is actively attempting to replicate the OneNote experience (and is quite successful in my opinion).

The other plugin I've found very useful is called Hamdwriting and has a lot of online support (including videos by its dev).

I have been desperately wanting a OneNote clone for years. Back in the early 2010s I used it for a massive project and it was absolute perfection. I’m talking about seriously heavy project with several users and many hundreds of pages, sections etc.

I’ve yet to find anything even approaching being close to as easy and well-organized and well-presented. I looked a little at Obsidian and I’ll try some more to learn it. OneNote took like a minute to learn and everything followed a standard intuitive design as most desktop applications of the day. I’ve been advised to look at Joplin, Obsidian and a few more, and I’ve given them a quick review but none even hold a candle to OneNote. It’s so sad because I’ve moved away from anything MS, and especially because it absolutely refuses to play well with any storage other than OneDrive, so I ended it when MS took away most of everyone’s included storage capacity. That was it for me.

I really wish we could just get an exact clone but one that let the data be on a local server. I would love to be able to use it on Linux and Android, and if possible, iOS. There’s just nothing that is as polished. One of MS’s best products ever. :-(

Joplin, I also self host my server and sync between my devices.

I switched to obsidian and haven't looked back. It doesn't appear to have stylus input in the core application (I don't need that), but it does look like there are a couple of community plugins that enable the support. Not sure how good they are though.

Have you tried saber?

https://github.com/saber-notes/saber/wiki/install

I only use it on Android so I'm not sure if Linux has the same capabilities, but it's similar to xournal++ but with more of a focus on building up a library of notes rather than marking up PDFs.

Logseq?

I don't use pen input, so I don't know if that works well or not, but it has drawing capability, can import PDFs to allow for highlighting and linking to contents

It's now split into the (original) markdown version and a DB version intended for realtime colaboration... so might meet some of your needs?

Short answer: no

Long answer: noooooooooo

No. I've been looking for ages. I use self-hosted Affine now, but this is not a direct replacement for all features of OneNote.

i use Joplin hosted in NextCloud for multi devices. Not sure of it drawing ability though?