Google core libraries for Java

Modern Java - A Guide to Java 8

jsoup: the Java HTML parser, built for HTML editing, cleaning, scraping, and XSS safety.

A simple expressive web framework for java. Spark has a kotlin DSL https://github.com/perwendel/spark-kotlin

Catch common Java mistakes as compile-time errors

✅ The 5th major version of the programmer-friendly testing framework for Java and the JVM

configuration library for JVM languages using HOCON files

jOOQ is the best way to write SQL in Java

vʌvr (formerly called Javaslang) is a non-commercial, non-profit object-functional library that runs with Java 8+. It aims to reduce the lines of code and increase code quality.

Keep your code spotless

🔬 Java Code Coverage Library

Awaitility is a small Java DSL for synchronizing asynchronous operations

Java libraries for writing microservices

Eclipse OpenJ9: A Java Virtual Machine for OpenJDK that's optimized for small footprint, fast start-up, and high throughput. Builds on Eclipse OMR (https://github.com/eclipse/omr) and combines with…

The reliable, generic, fast and flexible logging framework for Java.

Eclipse Collections is a collections framework for Java with optimized data structures and a rich, functional and fluent API.

Intelligent object mapping

Enhancing Java Stream API

jOOλ - The Missing Parts in Java 8 jOOλ improves the JDK libraries in areas where the Expert Group's focus was elsewhere. It adds tuple support, function support, and a lot of additional functional…

An extensive tutorial on RxJava

Java language server

State of the art mutation testing system for the JVM

A Persistent Java Collections Library

Secure and speedy templates for Java and Kotlin.

Stream utilities for Java 8

Generic, Null-safe, Immutable Collections and Functional Transformations for the JVM

Insanely fast ECS (Entity Component System) for Java

YAML for Java 8 and above. A user-friendly OOP library. Previously known as "Camel".

Eclipse Yasson project

SonarQube Scanner for Gradle