The OWASP ZAP core project

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

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

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 decentralized bitcoin exchange network

🔎 Open source distributed and RESTful search engine.

Free universal database tool and SQL client

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

APM, Application Performance Monitoring System

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

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

Java Bindings for V8

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.

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

An extensible multilanguage static code analyzer.

Strongbox is an artifact repository manager.

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

Soot - A Java optimization framework

Distributed Workflow Engine for Microservices Orchestration

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)

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.

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

AssertJ is a library providing easy to use rich typed assertions

A framework for building native applications using React

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

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

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

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

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

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

📲cim(cross IM) 适用于开发者的分布式即时通讯系统

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

Quarkus: Supersonic Subatomic Java.

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.

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.

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

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

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

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.

Free and Open, Distributed, RESTful Search Engine

Free and open source log management

A libre lightweight streaming front-end for Android.

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

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.

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

A podcast manager for Android

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