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.

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.

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

A decentralized bitcoin exchange network

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

Quarkus: Supersonic Subatomic Java.

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.

Process Orchestration Framework

CQEngine Next - Maintained Fork

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

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

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.

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

Free universal database tool and SQL client

📲cim(cross IM) 适用于开发者的分布式即时通讯系统

React Native Contacts

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

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

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

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.

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

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

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.

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

OWASP VulnerableApp Project: For Security Enthusiasts by Security Enthusiasts.

Free and open log management

AI + Data, online. https://vespa.ai

APM, Application Performance Monitoring System

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

🏗 Build container images for your Java applications.

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

An extensible multilanguage static code analyzer.

Terasology - open source voxel world

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

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

Free and Open Source, Distributed, RESTful Search Engine

Pluggable type-checking for Java

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

The ZAP by Checkmarx Core project

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)

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

🔎 Open source distributed and RESTful search engine.

A libre lightweight streaming front-end for Android.

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

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.

A podcast manager for Android