✅ The programmer-friendly testing framework for Java and the JVM

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

Simple Binary Encoding (SBE) - High Performance Message Codec

Free universal database tool and SQL client

OpenAPI Generator allows generation of API client libraries (SDK generation), server stubs, documentation and configuration automatically given an OpenAPI Spec (v2, v3)

Activiti is a light-weight workflow and Business Process Management (BPM) Platform targeted at business people, developers and system admins. Its core is a super-fast and rock-solid BPMN 2 process …

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

Gerrit Code Review - (mirror of https://gerrit.googlesource.com/gerrit)

A damn simple library for building production-ready RESTful web services.

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

Jenkins automation server

A browser automation framework and ecosystem.

阿里云计算平台DataWorks(https://help.aliyun.com/document_detail/137663.html) 团队出品，为监控而生的数据库连接池

Apache RocketMQ is a cloud native messaging and streaming platform, making it simple to build event-driven applications.

Mirror of Apache PDFBox

The official home of the Presto distributed SQL query engine for big data

#1 Locally hosted web application that allows you to perform various operations on PDF files

OpenMRS API and web application code

Java Native Access

Python IDE for Eclipse

Ip2region is an offline IP address manager framework and locator with both IPv4 and IPv6 supported, supporting billions of data segments, ten microsecond searching performance, xdb search client fo…

Web-based notebook that enables data-driven, interactive data analytics and collaborative documents with SQL, Scala and more.

Apache Druid: a high performance real-time analytics database.

《Hello 算法》：动画图解、一键运行的数据结构与算法教程。支持 Python, Java, C++, C, C#, JS, Go, Swift, Rust, Ruby, Kotlin, TS, Dart 代码。简体版和繁体版同步更新，English version in translation

Apache Pulsar - distributed pub-sub messaging system

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

All Algorithms implemented in Java

Google core libraries for Java

Suite of tools for deploying and training deep learning models using the JVM. Highlights include model import for keras, tensorflow, and onnx/pytorch, a modular and tiny c++ library for running mat…

Netty project - an event-driven asynchronous network application framework