Browserboard (https://browserboard.com https://browserboard.com), a multiuser whiteboard. It's a crowded space (excalidraw, awwapp, miro, freehand, etc.) but I

Browserboard (https://browserboard.com https://browserboard.com), a multiuser whiteboard. It's a crowded space (excalidraw, awwapp, miro, freehand, etc.) but I think it's pretty good! There are lots of fiddly technical details that go into smooth drawing, good performance with lots of objects, erasers that behave properly, etc.