overink
A pressure-sensitive vector ink layer you can mount on top of any editor.
Class notes: wave optics
This text lives in a plain contentEditable region. The ink you draw sits on a canvas layered above it, so handwriting and typing share the same page. Switch to the Type tool and the canvas lets every click through.
On an iPad, the Apple Pencil draws with real pressure while your palm and fingers scroll the page. On a desktop, draw with the mouse.
Best on iPad with Apple Pencil: pressure and palm rejection are live. Strokes are stored as vectors, never pixels.