The Kotlin Programming Language.

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

SQLDelight - Generates typesafe Kotlin APIs from SQL

The perfect companion for your Kotlin journey - Inspired by functional, data-oriented and concurrent programming

A Kotlin API for generating .kt source files.

Kotlin Symbol Processing API

A lightweight ORM framework for Kotlin with strong-typed SQL DSL and sequence APIs.

Kotlin gRPC implementation. HTTP/2 based RPC

Pure Kotlin CSV Reader/Writer

Documentation for the Ktor framework.

This projects gives Kotlin bindings and several extensions for Apache Spark. We are looking to have this as a part of Apache Spark 3.x

Functional companion to Kotlin's Compiler

Real World implementation - "The mother of all demo apps". Written in Kotlin, with Ktor, Arrow, SqlDelight, KotlinX Serialization, etc.

Koin Annotations - About Koin - a pragmatic lightweight dependency injection framework for Kotlin & Kotlin Multiplatform insert-koin.io

Source Code for O'Reilly Course

Powerful tool to monitor Ktor Client requests and responses, making it easier to debug and analyze network communication.

Opinionated Application State Management framework for Kotlin Multiplatform

Seamless two-way communication between Kotlin/Native and Kotlin/JVM. Supports suspend functions, classes, interfaces, no-copy buffers and much more.

Additional projects that improve the Micronaut experience with Kotlin

Fuzzy string matching for Kotlin (JVM, native, JS, Web Assembly) - port of Fuzzy Wuzzy Python lib

A lightweight Kotlin Multiplatform port of JDK IO classes (Reader, InputStream, BufferedReader, etc.), with support for character encoding via Charset.

A Kotlin compiler plugin for transforming suspend functions to platform-compatible non-suspend functions, such as the JVM Blocking API and CompletableFuture or JS Promise, etc. ☝️😺👍

A Kotlin native Postgres driver for SqlDelight.

Kotlin Multiplatform implementation of the JSONForms standard from the Eclipse Foundation

The Concordant Conflict-Free Replicated Datatypes (CRDT) library.

Building applications with Ktor and Arrow.kt in style

Kystrix is a small Kotlin DSL over Hystrix

Rankquest Studio is a web based tool that you can use to benchmark search relevance metrics for your search APIs.

It is a library for simplifying Firestore listener callbacks to Kotlin flow and suspend function to easily manage and use callbacks.