AndroidEventBus
Library for android, simplifies communication between services
...Unlike simple observer patterns, AndroidEventBus typically integrates with Android lifecycles so that subscribers are automatically registered, paused, or cleaned up based on activity/fragment state — reducing memory leaks and errant behavior during configuration changes. The library aims to simplify common inter-component messaging tasks (like posting a login success event or notifying multiple listeners of state changes) while preserving type safety and performance.