Demitter is a distributed event emitter library for Node.js that extends the familiar event API across multiple processes, threads, and machines. Built on top of the battle-tested emittery library, it enables real-time pub/sub messaging between Node.js applications with zero configuration. Perfect for microservices communication, multi-process coordination, and scaling Socket.IO applications without heavyweight message brokers like Redis or RabbitMQ. Features TypeScript support, efficient binary serialization, and can be deployed as embedded or standalone message forwarder.