Mac OSX OneNote Alternative Software
Is there an Alternative to Microsoft OneNote on the Mac?
This page was created when Microsoft OneNote was not available on the Mac, but now you can obtain OneNote for in the Mac App Store! It is free for a "limited time"
You might still enjoy some of the OneNote alternatives listed here, but if you are like me, you just wanted to USE OneNote on the Mac, and now you can as of 3/17/14. FINALLY!
Important Update - 3/17/14:
You might not need an alternative to OneNote if you just want to use OneNote on your Mac. You can now get Microsoft OneNote in the Mac App Store for free for a limited time!
Growly Notes is a free app for the Mac, and I think it may be the most similar app to MS OneNote. You can create multiple notebooks which will each be a file you save to your computer. You can have more than one notebook open at a time and it will show up as a tab at the top of the Growly Notes window. Within each notebook, you can have multiple sections, and under sections you have multiple pages. The tabs for sections and pages are along the side of the section you write in.
Thanks to those who in the comments who introduced me to Growly Notes.
You can get Circusponies Notebook 4 for download from Amazon.
CircusPonies Notebook 3.0
CircusPonies Notebook is the note taking software that I ended up getting for the Mac as a OneNote alternative before I found others (Update: And before OneNote itself became available for the Mac). It's not exactly like OneNote, but it's good in its own way.
You can have multiple notebooks with the idea that they are like paper notebooks. You have an index page, and dividers in your notebook and within those dividers you have other pages. You can create a writing page, an outline page, or a clipping page. You can of course clip things from the web or e-mail into the program. Some have mentioned it is buggy and I have had it crash on me a few times.
Note to Students:
You can buy Circusponies Notebook directly from the Circusponies site where you can choose an Academic license.
Thanks to those who mentioned Curio in the comments. I have not used it too much yet but it seems very cool. You can get a 15 day trial of Curio from zengobi.com. You can get the trial extended for another 60 days as well.
Curio 7 Professional Overview
Other OneNote Alternatives for the Mac
DevonThink is a very powerful information manager for the Mac. I am thinking of using this one in addition to Notebook but it seems to have a learning curve for me in order to learn all of the ins and outs of it. I haven't had time to sit down and learn how to use it properly yet. You can get a trial verson of the software and try it out.
Evernote is note taking software for the Mac, Windows, and the web. You can synch notes between all 3 if you want. It has a limited free version and a paid version. It also has an iPhone and iPod touch app so you can see all your notes on the go. I think I'll continue to use this for notes I want to have on my iPod Touch.
OmniOutliner is an outlining software for the Mac. I got a one day trial for it and it seemed okay but pretty complex and I did not want to spend the time to learn how to use it in one day. I think if you want to try it another day you can get a new key. I did however buy OmniFocus from them to use for GTD, but not for general note-taking.
Journler is a Journaling software for the Mac that you can store notes in. I tried the trial and liked the way it organized things in categories. The interface seems a lot like an e-mail interface to me.NoteTaker - a notebook app that looks promising, but I haven't tried yet.