And if there is a migration tool from onenote to the alternative that would be even better.
Xournal++ is the most similar in intention I believe.
I personally use a combination of logseq (FOSS) and obsidian (not FOSS, freemium I think). Obsidian is currently better on the tablet due to some particularly well put together plugins and a recent feature update but I’d like to move completely to logseq long term. However, if you’re looking for a touch centric experience it’s hard to deny that obsidian is the best in the ecosystem.
Of those options which would you recommend for a desktop user where majority of interfacing will be with keyboard and mouse? Particularly if I’m looking to migrate over lot of data from onenote to it.
Looks like exporting from OneNote to markdown is not ideal, so if you’re not willing to go the copy-paste route or manual entry you may want to look elsewhere. That said I think it’s a toss up between logseq and obsidian. Of course one is FOSS and one is not so keep that in mind if it’s a dealbreaker. They take slightly different approaches to the minimum size of a piece of content. Obsidian uses a page format (like joplin) while logseq is indexing on something closer in spirit to a paragraph (though these can be of arbitrary length). This has a couple of unique benefits like being able to automate the creation of flashcards and similar review tools. Both have vibrant plugin communities.