RxJava – Reactive Extensions for the JVM – a library for composing asynchronous and event-based programs using observable sequences for the Java VM.

光 HikariCP・A solid, high-performance, JDBC connection pool at last.

ANTLR (ANother Tool for Language Recognition) is a powerful parser generator for reading, processing, executing, or translating structured text or binary files.

A fast dependency injector for Android and Java.

A high performance caching library for Java

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

A standalone Java Decompiler GUI

Style and Grammar Checker for 25+ Languages

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…

Redis Java client

A Java API for generating .java source files.

A collection of source code generators for Java.

Feign makes writing java http clients easier

Test Automation Made Simple

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

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

OWASP dependency-check is a software composition analysis utility that detects publicly disclosed vulnerabilities in application dependencies.

Catch common Java mistakes as compile-time errors

Socket.IO server implemented on Java. Realtime java framework

Runtime code generation for the Java virtual machine.

jOOQ is the best way to write SQL in Java

configuration library for JVM languages using HOCON files

Picocli is a modern framework for building powerful, user-friendly, GraalVM-enabled command line apps with ease. It supports colors, autocompletion, subcommands, and more. In 1 source file so apps …

Yahoo! Cloud Serving Benchmark

Native Operating System and Hardware Information

Reactive Streams Specification for the JVM

An application observability facade for the most popular observability tools. Think SLF4J, but for observability.

Java runtime metadata analysis

A tool to help eliminate NullPointerExceptions (NPEs) in your Java code with low build-time overhead