I use a lot of apps for development, but the killer-app-secret-weapon is
On top of all its amazing built-in features, it's a powerful digital scrapbook that lets you embed any external document.
You can have pages of images to represent your locations, you can draw sketches, add FadeInPro files, video files -- ANYTHING.
It's like a development department in a box.
Download a 2-week demo and see.
One word:
Curio.
I used to be an avid OneNote user, but Curio is so much better.
It's all free-form, has a good tagging system, and supports almost everything I try to paste into it. It is almost like Apple made it themselves.
for macos it's Curio http://www.zengobi.com/products/curio/ but it's $129. For drawings we use ninjamock https://ninjamock.com/ and draw.io For creating live prototypes, that work like applications we use Mobsted https://mobsted.com
I use something called Curio on my Mac that lets me organize my notes that I take on my writing tablet. (Not a computer tablet like an iPad) It's helped me find all my notes very quickly, and kept all on my computer.
Hope this helped! :)
Notebook layout is still around, and got a bit better in 2011, but its almost the same as 2007. I used it for its indexed recordings, but then I never listened to them so I went back to curio.
If you are still looking for a onenote alternative, check out curio http://www.zengobi.com/products/curio/
The Closest thing is Curio, http://www.zengobi.com/products/curio/
It is better in some things, but worse in others
Nothing else comes close to onenote in functionality. But there are plenty of note taking softwares for the mac (Microsoft Word -> notebook layout does a competent job as good as most other ones, and it has indexed voice recording)