weavejs

Weavejs is a free, open-source JavaScript library that enables developers to build real-time collaborative applications—such as whiteboards and diagram editors—on HTML5 Canvas while allowing full control over the user interface. It is designed for developers who need to add multi-user, synchronized drawing or editing capabilities to their web apps without being locked into a pre-built UI framework. Its appeal lies in combining high-performance canvas rendering with seamless real-time collaboration, giving developers the flexibility to create custom, interactive tools from scratch.