Sometimes you want to make a design of something.
A whiteboard is then very handy. In most cases you would to like to use microsoft Visio.
But on my home pc I don't have Visio. A free alternative is Excalidraw.
You can draw some thing cool like this: (This for Demo only has no function)
Highlight some libraries.excalidraw.com:
Microsoft 365 icons
vmware Architecture Design
Kubernetes Icons Set
Microsoft azure cloud icons
Misc Azure Icons
Azure cloud services icons
Would be nice if we see more venders on the list.