Microsoft’s Whiteboard is free-form sketching app with infinite canvas (pages can be of any size) and lets you do convert your ideas into visual. Apart from free form sketching that allows you to draw, it has many other options to use without a digital pen. Most importantly it comes as super collaboration tool, that can be used within Microsoft Team Meetings.
It is Microsoft’s competitor app against Google’s Jamboard. We’ve covered a similar software Explain Everything.