You can store and edit Excalidraw files in your vault, you can embed drawings into your documents, and you can link to documents and other drawings to/and from Excalidraw. For a showcase of Excalidraw ...

Hand-drawn vector drawing of an Empty Village Square with No People. Black-and-White sketch on a transparent background (.eps-file). Included files are EPS (v10) and Hi-Res JPG. Royalty-free licenses ...