Top Welcoming Open-Source Java Repositories

OsmAnd tools to generate new maps & to test OsmAnd files on PC

Eclipse OpenJ9: A Java Virtual Machine for OpenJDK that's optimized for small footprint, fast start-up, and high throughput. Builds on Eclipse OMR (https://github.com/eclipse/omr) and combines with the Extensions for OpenJDK for OpenJ9 repo.

Java SDK for Milvus.

Virtual Cell Framework

The missing developer UI for Spring Boot and Quarkus!

The minecraft mod is an anvil-centric vanilla survival expansion. 这个Minecraft模组是一个以铁砧为中心的原版生存扩展。

Digital logic design tool and simulator

Eclipse BIRT™ The open source reporting and data visualization project.

Empowering Data Intelligence with Distributed SQL for Sharding, Scalability, and Security Across All Databases.

Apache IoTDB

Modifications to the Minecraft base files to assist in compatibility between mods. New Discord: https://discord.minecraftforge.net/

Process Orchestration Framework

IridiumSkyblock: Skyblock Redefined

EOLANG, an Experimental Pure Object-Oriented Programming Language Based on 𝜑-Calculus

A free and open-source database management tool, suitable for team use. It offers capabilities such as access control, data anonymization, SQL auditing, CI/CD, and supports cross-regional deployment.

🔥 人人可用的开源 BI 工具，数据可视化神器。An open-source BI tool alternative to Tableau.

BigQuery data source for Apache Spark: Read data from BigQuery into DataFrames, write DataFrames into BigQuery tables.

Multi-Agent Transport Simulation

Web-based notebook that enables data-driven, interactive data analytics and collaborative documents with SQL, Scala and more.

A networking framework that evolves with your application

A Fabric mod that brings (Neo)Forge mods into the Fabric ecosystem.

GeoServer Cloud offers ready to use Spring Boot Apps provided for cloud use as dockerized microservices.

CiviForm simplifies the application process for government benefits programs by re-using applicant data for multiple benefits applications. It's being developed by Google.org and Exygy, in collaboration with the City of Seattle and community contributors.

Simplenote for Android

EventMesh is a new generation serverless event middleware for building distributed event-driven applications.

Apache Kafka® running on Kubernetes

Enterprise-grade, commercial-friendly agentic workflow platform for building next-generation SuperAgents.

RStudio is an integrated development environment (IDE) for R

Reitti is a comprehensive personal location tracking and analysis application that helps you understand your movement patterns and significant places. The name "Reitti" comes from Finnish, meaning "route" or "path".

Framework for automated integration tests with focus on message-based applications

Event Driven Orchestration & Scheduling Platform for Mission Critical Applications

Vaadin platform 10+ is a Java web development platform based on Vaadin web components. If you don't know to which repository your bug report should be filed, use this and we'll move it to the right one.

Dependency-Track is an intelligent Component Analysis platform that allows organizations to identify and reduce risk in the software supply chain.

EDC core services including data plane and control plane

APM, (Application Performance Management) tool for large-scale distributed systems.

🔥 Cordys 是由飞致云匠心打造的新一代的开源 AI CRM 系统，深度融合信息化、数字化与智能化能力，支持私有化部署，全面保障企业数据安全与主权。

GPU-accelerated Llama3.java inference in pure Java using TornadoVM.

SymmetricDS is database replication and file synchronization software that is platform independent, web enabled, and database agnostic. It is designed to make bi-directional data replication fast, easy, and resilient. It scales to a large number of nodes and works in near real-time across WAN and LAN networks.

Accurate Gameboy Color emulator.

An enterprise-grade Java-based, Apache 2.0 licensed Ethereum client https://github.com/besu-eth/besu/wiki

Eclipse Tahu addresses the existence of legacy SCADA/DCS/ICS protocols and infrastructures and provides a much-needed definition of how best to apply MQTT into these existing industrial operational environments.

Automated mass refactoring of source code.

We do Open Source ERP - Fast, Flexible & Free Software to scale your Business.

An open-source Java library for Constraint Programming

Hop Orchestration Platform

Flutter Plugin for IntelliJ

Wynntils (Artemis) is a rewrite of Wynntils in 1.21.11 using Architectury, to support Fabric and Forge.

Common libraries for TERASOLUNA Server Framework for Java (5.x)

A process for collecting metrics using JMX MBeans for Prometheus consumption