JUnit test runtime for Scala.js - provides the runtime infrastructure for running JUnit tests compiled with Scala.js

The industry-standard unit testing framework for Android that enables running tests in a simulated Android environment inside a JVM without requiring an emulator or device.

Generic automation framework for acceptance testing and robotic process automation (RPA)

Java runtime metadata analysis library that enables reverse querying of classpath metadata for type system introspection

Valkey and Redis Java client providing complete Real-Time Data Platform with distributed objects and services

Quartz Enterprise Job Scheduler - A richly featured, open source job scheduling library that can be integrated within virtually any Java application

Jython is an implementation of Python 2.7 written in 100% Pure Java, providing seamless integration with the Java platform and ecosystem.

Project Lombok is a java library that automatically plugs into your editor and build tools, spicing up your java. Never write another getter or equals method again, with one annotation your class has a fully featured builder, automate your logging variables, and much more.

PowerMock module for TestNG that enables mocking of static methods, constructors, final classes and methods, private methods, and removal of static initializers in TestNG-based unit tests.

Deep cloning library for objects across different classloaders using XStream serialization

PowerMock API for Mockito 2.+ that enables advanced mocking of static methods, constructors, final classes and private methods through bytecode manipulation.

PowerMock API extension for Mockito that enables mocking of static methods, constructors, final classes and methods, private methods, and advanced testing capabilities through bytecode manipulation and custom classloading

PowerMock API extension for EasyMock providing advanced mocking capabilities for static methods, constructors, final classes, and private methods through bytecode manipulation.

Zinc is a standalone version of sbt's incremental compiler meant to be run in nailgun.

Integration testing framework for OSGi applications running in Apache Karaf containers

OpenSearch is a distributed, RESTful search and analytics engine built as a community-driven fork of Elasticsearch.

OpenRewrite Maven parsing and refactoring library that provides Maven POM file parsing, analysis, and automated refactoring capabilities

OpenAPI Generator allows generation of API client libraries (SDK generation), server stubs, documentation and configuration automatically given an OpenAPI Spec

Neo4j Community Edition - The world's leading Graph Database with Cypher query language and ACID transactions.

A distributed parameter server client component for ND4J, enabling parameter synchronization across multiple nodes in distributed machine learning workloads