I'm calling it AirState (https://airstate.dev). We're making a set of primitives and react hooks that help you build real-time applications in like 2 lines of change. Our first product is called SharedState, you can use it via the useSharedState hook in React.
It behaves exactly how to expect it to behave. It's a drop-in replacement for useState but it syncs across clients and computers in real-time. By default it connects to our cloud that has a free-tier but we'll also open source the server so that people can self-host it. Kinda following in the footsteps of PostHog.
AirState — Open Source Real-time SDKsPrimitives for building powerful real-time experiences
