The Janssen Project is a home for open source IAM components, featuring Auth Server (OAuth/OpenID), Agama low-code identity orchestration, and the Cedarling policy decision point. The "Janssen Server" distributions bundle IAM components under one control plane.

Process Orchestration Framework

CQEngine Next - Maintained Fork

The java implementation of Apache Dubbo. An RPC and microservice framework.

an easy-to-use dynamic service discovery, configuration and service management platform for building AI cloud native applications.

QuestDB is a high performance, open-source, time-series database

OWASP VulnerableApp Project: Break it. Scan it. Reproduce it. Benchmark against it. Improve it.

🔥 Seata is an easy-to-use, high-performance, open source distributed transaction solution.

A powerful flow control component enabling reliability, resilience and monitoring for microservices. (面向云原生微服务的高可用流控防护组件)

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

Event Driven Orchestration & Scheduling Platform for Mission Critical Applications

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.

A DLNA, UPnP and HTTP(S) Media Server.

Pluggable type-checking for Java

A decentralized bitcoin exchange network

🏗 Build container images for your Java applications.

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.

🦖 Classic arcade shoot 'em up built with Java & FXGL. Contributions welcome – game & Next.js docs.

A libre lightweight streaming front-end for Android.

The AI search platform

Quarkus: Supersonic Subatomic Java.

SpotBugs is FindBugs' successor. A tool for static analysis to look for bugs in Java code.

Your go-to microservice framework for any situation, from the creator of Netty et al. You can build any type of microservice leveraging your favorite technologies, including gRPC, Thrift, Kotlin, Retrofit, Reactive Streams, Spring Boot and Dropwizard.

CrateDB is a distributed and scalable SQL database for storing and analyzing massive amounts of data in near real-time, even with complex queries. It is PostgreSQL-compatible, and based on Lucene.

The Data Transfer Project makes it easy for platforms to build interoperable user data portability features. We are establishing a common framework, including data models and protocols, to enable direct transfer of data both into and out of participating online service providers.

Soot - A Java optimization framework

Apache Doris is a real-time analytics and hybrid search database for AI agents.

🔎 Open source distributed and RESTful search engine.

OpenGrok is a fast and usable source code search and cross reference engine, written in Java

Desktop app for managing BibTeX and BibLaTeX (.bib) libraries

Free universal database tool and SQL client

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

An extensible multilanguage static code analyzer.

The ZAP by Checkmarx Core project

Eclipse Collections is a collections framework for Java with optimized data structures and a rich, functional and fluent API.

Kafka GUI for Apache Kafka to manage topics, topics data, consumers group, schema registry, connect and more...

Open source routing engine for OpenStreetMap. Use it as Java library or standalone web server.

a fast, scalable, multi-language and extensible build system

Hazelcast is a unified real-time data platform combining stream processing with a fast data store, allowing customers to act instantly on data-in-motion for real-time insights.

A podcast manager for Android

Free and open log management

Terasology - open source voxel world

Cruise-control is the first of its kind to fully automate the dynamic workload rebalance and self-healing of a Kafka cluster. It provides great value to Kafka users by simplifying the operation of Kafka clusters.

Free and Open Source, Distributed, RESTful Search Engine