CrateDB is a distributed SQL database that makes it simple to store and analyze massive amounts of data in real-time. Built on top of Lucene.

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

APM, Application Performance Monitoring System

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.

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

Ecosystem to transform any database into a distributed database system, and enhance it with sharding, elastic scaling, encryption features & more

Graphical Java application for managing BibTeX and biblatex (.bib) databases

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

Free universal database tool and SQL client

Free and Open, Distributed, RESTful Search Engine

📲cim(cross IM) 适用于开发者的分布式即时通讯系统

Open-source distributed computation and storage platform. Real-time Stream Processing Unconference. Save Your Spot https://hazelcast.com/lp/unconference/

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.

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

Java Bindings for V8

A decentralized bitcoin exchange network

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

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

Quarkus: Supersonic Subatomic Java.

SVG library for React Native, React Native Web, and plain React web projects.

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

An extensible multilanguage static code analyzer.

The open big data serving engine. https://vespa.ai

An Android library for managing images and the memory they use.

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.

Cross-platform framework for building truly native mobile apps with Java or Kotlin. Write Once Run Anywhere support for iOS, Android, Desktop & Web.

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.

The SpotBugs plugin for security audits of Java web applications and Android applications. (Also work with Kotlin, Groovy and Scala projects)

The OWASP ZAP core project

Free and open source log management

A framework for building native applications using React

A libre lightweight streaming front-end for Android.

Allure Report is a flexible, lightweight multi-language test reporting tool. It provides clear graphical reports and allows everyone involved in the development process to extract the maximum of information from the everyday testing process

Terasology - open source voxel world

OWASP VulnerableApp Project: For Security Enthusiasts by Security Enthusiasts.

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

Distributed Workflow Engine for Microservices Orchestration

Soot - A Java optimization framework

🔎 Open source distributed and RESTful search engine.

The Data Transfer Project makes it easy for people to transfer their data between online service providers. 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.

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

Strongbox is an artifact repository manager.

An open source time-series database for fast ingest and SQL queries

AssertJ is a library providing easy to use rich typed assertions

Apache Doris is an easy-to-use, high performance and unified analytics database.

Slide is an open-source, ad-free Reddit browser for Android.

A classic inspired shoot em' up game written in Java with JavaFX and FXGL.

Apache Dubbo is a high-performance, java based, open source RPC framework.

A podcast manager for Android

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)

🏗 Build container images for your Java applications.