Draw on a Map doesn't need an account for you to draw and share, and the map stays in the URL fragment (not sent to the server) when not logged in. You can open, draw, share in a matter of 30 seconds.
The app is built on top of Cloudflare and using the data from OpenStreetMap. We wanted something lean that doesn't require a big time investment to learn how to use.
Would highly appreciate any feedback!