Top JAVA GitHub Repositories & Tools (2026)

Minecraft Wurst Hacked Client v7

JasperReports® - Free Java Reporting Library

Mathematical expression evaluator in JavaScript

Java language binding for writing Appium Tests, conforms to W3C WebDriver Protocol

👽 Wire for web

Web dashboard for Traccar, the open source GPS tracking platform

Builders and buildpacks designed to run on Google Cloud's container platforms

A library that creates fully populated objects for your unit tests.

Secure and speedy templates for Java and Kotlin.

Open-source, self-hosted enterprise & site search server built on OpenSearch. Crawls web / file / DB / cloud sources, 20+ languages, REST API, and AI/RAG & semantic search. Apache-2.0.

Apache OFBiz is an open source product for the automation of enterprise processes. It includes framework components and business applications for ERP, CRM, E-Business/E-Commerce, Supply Chain Management and Manufacturing Resource Planning. OFBiz provides a foundation and starting point for reliable, secure and scalable enterprise solutions.

HiveMQ MQTT Client is an MQTT 5.0 and MQTT 3.1.1 compatible and feature-rich high-performance Java client library with different API flavours and backpressure support

Official GanttProject repository.

An open source ML system for the end-to-end data science lifecycle

SuperDoc - Build AI agents that work with DOCX (DOCX Editor, DOCX Agent SDK)

Full-stack localization for every framework

The JVM native WebAssembly runtime

A networking framework that evolves with your application

Java library for the Stripe API.

A scalable, mature and versatile web crawler based on Apache Storm