I have looked at several tools - draw.io, gliffy, lucidcharts. None support freehand drawing.
I know there are several online whiteboards, but I'm looking for something more sophisticated.
should have:
- both shapes and allow free-hand drawing
- collaboration
- private drawings
- ability to save diagrams
- ability to export and import diagrams
basically, gliffy or draw.io with freehand capabilities.