RxJava is considered one of the top Android libraries due to its ability to simplify asynchronous operations and represent data in real-time. It makes it easier to switch threads, handle errors, and chain asynchronous operations, making developers' lives easier. Dagger is another essential library for dependency injection, generating plain Java source code and working in compile-time to estimate and analyze dependencies. Retrofit is a type-safe HTTP client that allows defining REST APIs as interfaces with annotations controlling API requests' headers, body, query parameters, and more. Glide is an open-source image loading and media management library that wraps media decoding, memory and disk caching, and resource pooling into a simple interface. Room is an official ORM Android library for building offline apps, utilizing the full power of SQLite while maintaining an abstraction layer on top of it to manage data as Java objects.