A decentralized bitcoin exchange network

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

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

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

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.

AssertJ is a library providing easy to use rich typed assertions

APM, Application Performance Monitoring System

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)

Quarkus: Supersonic Subatomic Java.

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

🏗 Build container images for your Java applications.

Soot - A Java optimization framework

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

Java Bindings for V8

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.

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.

Free universal database tool and SQL client

An extensible multilanguage static code analyzer.

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

Free and open source log management

Open-source distributed computation and storage platform

A libre lightweight streaming front-end for Android.

Strongbox is an artifact repository manager.

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

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, Distributed, RESTful Search Engine

📲cim(cross IM) 适用于开发者的分布式即时通讯系统

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

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

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

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

Slide is an open-source, ad-free Reddit browser 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

Collection of Quines in all programming languages

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

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

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

Terasology - open source voxel world

A podcast manager for Android

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.

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

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.

React Native Contacts

OWASP VulnerableApp Project: For Security Enthusiasts by Security Enthusiasts.

The OWASP ZAP core project

🔎 Open source distributed and RESTful search engine.

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

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

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

Distributed Workflow Engine for Microservices Orchestration

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