Redux is a widely used state management library in JavaScript applications, offering a centralized store for application state, agnostic to any specific framework. It utilizes actions and reducers to manage state changes predictably. The article explores five libraries that complement Redux by enhancing code reuse and state management: Redux-Actions simplifies action creation by adhering to the Flux Standard Actions (FSA) specification; Reselect provides memoized selectors to efficiently compute derived data from the Redux store; Redux-Saga and Redux-Observable offer powerful tools for handling side effects, with Redux-Saga using generator functions and Redux-Observable leveraging RxJS; and Normalizr helps in normalizing nested JSON data for easier management within Redux. Each library aims to streamline Redux usage, improve code maintainability, and handle complex application requirements effectively.