The 800 pound gorilla of the note taking app market is Evernote. It's weird to think of Microsoft as underdog, but they really are when it comes to this kind of app. As in all things, your mileage may vary in this regard. I don't have any experience with the Windows version of OneNote, but I've read numerous complaints from users of both versions that suggest the Mac version comes up a bit short, especially in areas like saving text formatting options, document and file importing and attachment and more. You can share notes with users outside your workflow by embedding the note in an email or by sending links Microsoft offers the option of a read-only link or an editable link as well. Late last year, Microsoft added the ability to open notebooks stored on SharePoint Servers, as well. You can embed PDFs after a fashion, as 'printouts' that can then be annotated. Unlike Evernote, OneNote doesn't have any easy way of embedding web pages into your notes, which makes it a less-than-ideal tool for collecting info off the web for later collation and digestion.

It's no replacement for Excel, but it's good enough to get some basic tabulation work done if you need to.

You can embed images and you can also create tables that can include some basic calculations. OneNote sports myriad formatting features to make your text look however you'd like it to, as well. You can create subpages and sub-sections, reorganizing your notes however you'd like.

Next mac update for microsoft onenote