I just got a drawing tablet, and have been wanting some software that would allow me to work out math problems, draw architecture diagrams, etc. I’ve seen some tools like Excalidraw, which look handy for the sharing capabilities. I also have just used plain krita, which has great feedback for the pen sensitivity, but obviously is overkill for whiteboarding.

Are there any tools you use or recommend for handwriting or picture drawing? Pen or mouse?