The Kotlin Programming Language.

Square’s meticulous HTTP client for the JVM, Android, and GraalVM.

A powerful image downloading and caching library for Android

Compose Multiplatform, a modern UI framework for Kotlin that makes building performant and beautiful user interfaces easy and enjoyable.

Pleasant Android application development

Framework for quickly creating connected applications in Kotlin with minimal effort

Library support for Kotlin coroutines

A sample audio app for Android

Koin - a pragmatic lightweight dependency injection framework for Kotlin & Kotlin Multiplatform

A modern I/O library for Android, Java, and Kotlin Multiplatform.

Kotlin SQL Framework

A simple and modern Java and Kotlin web framework

A declarative framework for building efficient UIs on Android.

An anti-bikeshedding Kotlin linter with built-in formatter

SQLDelight - Generates typesafe Kotlin APIs from SQL

Kotlin multiplatform / multi-format serialization

Rust plugin for the IntelliJ Platform

gRPC and protocol buffers for Android, Kotlin, Swift and Java.

Lightweight JavaFX Framework for Kotlin

Kotlin Symbol Processing API

The Functional toolkit for Kotlin HTTP applications. http4k provides a simple and uniform way to serve, consume, and test HTTP services.

DivKit is an open source Server-Driven UI (SDUI) framework. SDUI is a an emerging technique that leverage the server to build the user interfaces of their mobile app

Kotlin DSL for HTML

Sample projects for Ktor

Kotlin gRPC implementation. HTTP/2 based RPC

Kotlin Serverless Framework

A Kotlin web framework

Kovenant. Promises for Kotlin.

Hexagon is a microservices toolkit written in Kotlin. Its purpose is to ease the building of services (Web applications or APIs) that run inside a cloud platform.

Multiplatform AWS SDK for Kotlin