Design patterns implemented in Java

Free and Open, Distributed, RESTful Search Engine

Ghidra is a software reverse engineering (SRE) framework

Google core libraries for Java

FizzBuzz Enterprise Edition is a no-nonsense implementation of FizzBuzz made by serious businessmen for serious business purposes.

A fast dependency injector for Android and Java.

High Performance Inter-Thread Messaging Library

Zipkin is a distributed tracing system

A high performance caching library for Java

Stetho is a debug bridge for Android applications, enabling the powerful Chrome Developer Tools and much more.

A Java API for generating .java source files.

OpenRefine is a free, open source power tool for working with messy data and improving it

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

Resilience4j is a fault tolerance library designed for Java8 and functional programming

Continuous Inspection

A programmer-oriented testing framework for Java.

Java Native Access

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

Java DSL for easy testing of REST services

Apache Storm

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

Generate Java types from JSON or JSON Schema and annotate those types for data-binding with Jackson, Gson, etc

GraphQL Java implementation

A Java to iOS Objective-C translation tool and runtime.

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.

An Open Source Java Decompiler Gui for Procyon

Fibers, Channels and Actors for the JVM