A whiteboard that stays on your machine Canvas
How it works
Draw with the pen, double click for a sticky note (with a finger, use Note, and tap a selected note to edit it), drag a box to select several things. Everything autosaves in this browser.
Doing this often? When a sketch has to become a finished diagram, OBSCURA Vector draws it with the pen, shapes, type and layers, out as SVG, PDF or PNG. On its own, US$4 a month; with everything else, US$9 a month or US$79 a year. 7 days free.