Free and Open Source, Distributed, RESTful Search Engine

Apache Flink

GraalVM compiles applications into native executables that start instantly, scale fast, and use fewer compute resources 🚀

IntelliJ IDEA & IntelliJ Platform

The official home of the Presto distributed SQL query engine for big data

Apache Hadoop

A Java 8+ Jar & Android APK Reverse Engineering Suite (Decompiler, Editor, Debugger & More)

Suite of tools for deploying and training deep learning models using the JVM. Highlights include model import for keras, tensorflow, and onnx/pytorch, a modular and tiny c++ library for running mat…

Official repository of Trino, the distributed SQL query engine for big data, formerly known as PrestoSQL (https://trino.io)

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

A Java API for generating .java source files.

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

Checkstyle is a development tool to help programmers write Java code that adheres to a coding standard. By default it supports the Google Java Style Guide and Sun Code Conventions, but is highly co…

Testcontainers is a Java library that supports JUnit tests, providing lightweight, throwaway instances of common databases, Selenium web browsers, or anything else that can run in a Docker container.

Efficient reliable UDP unicast, UDP multicast, and IPC message transport

A programmer-oriented testing framework for Java — ⚠️ maintenance mode

1️⃣🐝🏎️ The One Billion Row Challenge -- A fun exploration of how quickly 1B rows from a text file can be aggregated with Java

Tools for keeping your cloud operating in top form. Chaos Monkey is a resiliency tool that helps applications tolerate random instance failures.

📈 Capturing JVM- and application-level metrics. So you know what's going on.

Examples and server integrations for generating the Swagger API Specification, which enables easy access to your REST API

jOOQ is the best way to write SQL in Java

Asynchronous Http and WebSocket Client library for Java

configuration library for JVM languages using HOCON files

Reformats Java source code to comply with Google Java Style.

Java 1-25 Parser and Abstract Syntax Tree for Java with advanced analysis functionalities.

Apache Pinot - A realtime distributed OLAP datastore

Main Liquibase Source

Apache Calcite

Apache Maven core

Joda-Time is the widely used replacement for the Java date and time classes prior to Java SE 8.