OneNote

Microsoft OneNote uses a freeform, notebook-section-page hierarchy with a canvas-like interface ideal for mixing typed text, handwriting, images, and audio. It's deeply integrated with Windows and Microsoft 365. Its strength is in unstructured note-taking, research compilation, and lecture notes. It's free for most uses.

It targets students, researchers, and anyone who prefers a spatial, paper-like metaphor. It scores for its flexibility, zero cost for many, and excellent ink support, though it lacks modern database features and backlinking.