Open-source alternatives to Kara

Fuel is a Kotlin HTTP client library for Android and Kotlin applications that handles both synchronous and asynchronous web requests. It functions as a network wrapper that supports executing calls via suspending functions in coroutines, reactive streams, and traditional callbacks. The library features built-in integration for Android LiveData to bind network responses directly to observable state holders for user interface updates. It also includes a JSON serialization client that utilizes customizable mappers to convert raw HTTP response bodies into structured data objects. Capability area

Ktor is a framework for building asynchronous server applications and cross-platform network clients using the Kotlin programming language. It provides a lightweight, modular architecture that allows developers to construct services and communication layers by composing independent components and plugins. The framework is defined by its pipeline-based plugin system, which enables the injection of custom logic into request processing stages, and a type-safe domain-specific language for defining application routing. By utilizing an asynchronous execution model, it handles concurrent network ope

Spark-kotlin is a lightweight web framework for the Java Virtual Machine that provides a domain-specific language for building server-side applications. It functions as an HTTP request router, allowing developers to map URL patterns and request methods to functional handlers to process web traffic. The framework utilizes a static method-based syntax to configure the embedded server runtime and manage network connections. It supports real-time bidirectional communication through an event-driven lifecycle for web sockets, enabling the definition of handlers for connection events and incoming da