Modern React applications require effective notification systems to engage users, and selecting the right library can greatly enhance development speed and user experience. The text explores various open-source notification libraries for React in 2025, categorizing them based on their primary use cases and strengths. Libraries like Sonner are recommended for modern applications due to their design and developer experience, while React Hot Toast is praised for its minimalist, lightweight approach. React Toastify offers extensive customization for feature-rich applications, and Notistack is ideal for Material-UI applications requiring complex notification management. Reapop integrates with Redux for centralized notification state management, providing a unique approach to managing notifications. For modal-style alerts, SweetAlert2 and shadcn/ui Dialog components offer rich experiences and design system consistency, respectively. In terms of real-time and push notifications, Socket.IO Client and Web Push are highlighted for their capabilities in providing live updates and browser push notifications. The article emphasizes that while these libraries handle UI components effectively, a complete notification infrastructure—like Knock—can address challenges such as real-time infrastructure complexity, cross-channel coordination, and preference management, integrating seamlessly with these client-side solutions to enhance reliability and scalability.