I use Excalidraw extensively at work. For me, it's really close to perfection.

It has an excellent UI, selections work way better than Lucid or Figma etc, the sketchy look makes it clear designs are rough and not blueprints, it's private and loads instantly.

The one negative is that it's a pain to get the multiplayer self-hosted version running.

Both Excalidraw and TLDraw are the two most popular apps of their kind, simplistic whiteboard tools, so I don't think it's that surprising and I don't see any reason why this post should be a "Show HN".

TLDraw: https://www.tldraw.com/

Excalidraw: https://excalidraw.com/

I love excalidraw, but don't need the excalidraw+. But Excalidraw open source is the frontend only, which means I have to delete my drawings each time. So I built the backend so I can create many canvases.

https://drawx.ossy.dev