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Onenote alternatives
(beehaw.org)
If it's free and open source and it's also software, it can be discussed here. Subcommunity of Technology.
This community's icon was made by Aaron Schneider, under the CC-BY-NC-SA 4.0 license.
If you're used to the OneNote desktop, try OneNote web.
I maintain my RPG groups' notebooks and have stuck with OneNote throughout - especially because it's easy to share access through the web application.