Redux
A Predictable State Container for JavaScript apps
...Unlike Flux (from which Redux was inspired), Redux only has a single store for the object tree where the whole state of your app is stored. This store has a single root reducing function. As your app grows, instead of adding stores you split the root reducer into smaller ones that work independently on different parts of the state tree. This architecture allows for scaling well to large and complex apps, and also enables very powerful developer tools.