Note taking and task management program for students

Evernote sounds perfect - just use local notebooks and you don't need Evernote premium.

Then just use the Calendar app for appointments and Pages/Word for real word processing.

 

The best task management/assignment app is iStudiez Pro. There are also apps for the iPhone and iPad and everything syncs wirelessly. It also includes data from your "non-school" calendar (iCal or w/e you use) and lists that stuff along with your classes and due dates. I prefer to keep my life calendar and my school calendar separate. iStudiez Pro let's me see everything all together and keep the separate Google Calendar for non-school tasks. It's excellent.

For not taking, it sounds like Evernote is a good fit for you. I prefer to use AudioNote as it uses the MacBook's microphone to record audio of the lecture and timestamps each line of text. When I'm studying I can click the timestamp next to something I wrote in class and the audio will zip to whatever the professor was saying when I typed it. It's awesome. The downside is that it's not a "notebook" per se; you have to manually manage every file the old fashioned way. It's worth it in my opinion though. You can also export the audio files as MP3's for listening on a mobile device.

 

You might find Scrivener an ideal software. I use it for editing a magazine, so the categories you need can accommodate several levels. The export to .rtf is excellent. Best software for writing and taking notes, and you can import any file needed. I also use it to write in four blogs, keep all in one project, with years, months, and articles. Superb tool and very versatile.

Or you might find Notebook by Circus Ponies to meet your needs. Has more than just note taking capability.

I have both, but I use Scrivener 98% of the time for this type of work. And if necessary you can use Dropbox to synch among multiple machines if that is critical.