A libre lightweight streaming front-end for Android.

🔎 Open source distributed and RESTful search engine.

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

Quarkus: Supersonic Subatomic Java.

Free and Open Source, Distributed, RESTful Search Engine

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.

Process Orchestration Framework

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.

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

The AI search platform

CQEngine Next - Maintained Fork

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

Free and open log management

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

Soot - A Java optimization framework

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 podcast manager for Android

The ZAP by Checkmarx Core project

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.

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

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

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

A decentralized bitcoin exchange network

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

Pluggable type-checking for Java

Event Driven Orchestration & Scheduling Platform for Mission Critical Applications

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

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

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.

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.

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

Free universal database tool and SQL client

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

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

🏗 Build container images for your Java applications.

Terasology - open source voxel world

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

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

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.

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

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.