Excalidraw
whiteboardsketchdiagram
Excalidraw is a virtual collaborative whiteboard tool that lets you easily sketch diagrams that have a hand-drawn feel to them.
Related products
tldraw: Infinite Canvas SDK for React
The tldraw SDK provides tools, services, and APIs to build beautiful whiteboards and infinite canvas applications with real-time collaboration and a powerful React-based canvas.
Heptabase
NewAn intelligent, visual knowledge base built for students, researchers, and lifelong learners — think on an infinite whiteboard.
Spline
Spline is a free 3D design software with real-time collaboration to create web interactive experiences in the browser. Easy 3d modeling, animation, textures, and more.