Excalidraw (github.com/excalidraw/excalidraw) is a free, virtual, open-source editor for sketching hand-drawn like diagrams. Its built in React + typescript.

This talk covers:

1. Little bit about when and why Excalidraw was built
2. How did the community grew and I got involved in it
3. How are drawings encrypted - the server can't see your drawings!
4. Closing thoughts