Tldraw

tldraw is an open-source, extensible infinite canvas engine and SDK for React, enabling developers to rapidly build collaborative drawing and diagramming apps. It offers real-time multiplayer features, full extensibility with custom shapes, tools, and UI components, and supports AI integrations as well as a wide array of web-embedding and export options. Used by major tech companies, it is ideal for teams, product developers, and anyone building whiteboard, diagram, or visual collaboration experiences.