The Kotlin Programming Language.

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

Library support for Kotlin coroutines

Static code analysis for Kotlin

An anti-bikeshedding Kotlin linter with built-in formatter

SQLDelight - Generates typesafe Kotlin APIs from SQL

mocking library for Kotlin

Powerful, elegant and flexible test framework for Kotlin with assertions, property testing and data driven tests.

Gradle plugin to create fat/uber JARs, apply file transforms, and relocate packages for applications and libraries. Gradle version of Maven's Shade plugin.

Samples builds using the Gradle Kotlin DSL

API documentation engine for Kotlin

Lightweight Multiplatform logging framework for Kotlin. A convenient and performant logging facade.

Multiplatform command line interface parsing for Kotlin

A testing library for kotlinx.coroutines Flow

A collection of hand-crafted extensions for your Kotlin projects.

KotlinX multiplatform date/time library

A suite of tools to automate software compliance checks.

Module that adds support for serialization/deserialization of Kotlin (http://kotlinlang.org) classes and data classes.

Kotlin kernel for Jupyter/IPython

A multiplatform Result monad for modelling success or failure operations.

The idiomatic way to use atomic operations in Kotlin

Idiomatic Kotlin Wrapper for The Discord API

The modelling for success/failure of operations in Kotlin and KMM (Kotlin Multiplatform Mobile)

Algorithms and data structures in Kotlin.

Portable validations for Kotlin

Pure Kotlin CSV Reader/Writer

YAML support for kotlinx.serialization

🧩 Shape-Safe Symbolic Differentiation with Algebraic Data Types

SpringMockK: MockBean and SpyBean, but for MockK instead of Mockito

Pull Request-like Review/Approval flow for database queries. For compliant but smooth Engineering access to production.