Windows/Mac/Linux: If our talk about Cornell-style note taking caught your eye and you wished there was an easy to use application for taking them, you'll want to check out Notalon.
Notalon is divided into two columns. In the left hand column are headers and in the right hand column are notes that correspond with the headers. Formatting is purposely limited to bold and italics, to keep the focus on note taking instead of tinkering with the text.
Notalon has keyboard shortcuts for all the its functions, you can quickly create new headers and notes without having to take your hands off the keyboard. Your notes can be saved in the Notalon's native format or exported as PDF files.
Love the idea but still an analogue note-taker at heart? Check out this PDF generator to make your own printable Cornell templates. Notalon is open source and available for Windows, Mac, and Linux.