The Kotlin Programming Language.

Kotlin multiplatform / multi-format serialization

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

Lightweight JavaFX Framework for Kotlin

Painless Kotlin Dependency Injection

Using Mockito with Kotlin

Immutable persistent collections for Kotlin

Hamcrest for Kotlin

A collections of extension functions to make the JVM Future, CompletableFuture, ListenableFuture API more functional and Kotlin like.

Kotlin's Undo Framework to ease undo/redo operations and allow (de)serialize undo-stack to string