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56 stars written in Java
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Free and Open Source, Distributed, RESTful Search Engine

Java 75,279 25,579 Updated Oct 27, 2025

Google core libraries for Java

Java 51,219 11,079 Updated Oct 22, 2025

A powerful 🚀 Android chart view / graph view library, supporting line- bar- pie- radar- bubble- and candlestick charts as well as scaling, panning and animations.

Java 38,137 9,058 Updated Jun 5, 2025

Apollo is a reliable configuration management system suitable for microservice configuration management scenarios.

Java 29,687 10,225 Updated Oct 26, 2025

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

Java 25,863 8,877 Updated Oct 27, 2025

Apache Flink

Java 25,410 13,745 Updated Oct 27, 2025

Jenkins automation server

Java 24,581 9,170 Updated Oct 27, 2025

Hystrix is a latency and fault tolerance library designed to isolate points of access to remote systems, services and 3rd party libraries, stop cascading failure and enable resilience in complex di…

Java 24,424 4,712 Updated Oct 17, 2023

A Java serialization/deserialization library to convert Java Objects into JSON and back

Java 24,180 4,356 Updated Oct 26, 2025

光 HikariCP・A solid, high-performance, JDBC connection pool at last.

Java 20,792 3,001 Updated Sep 12, 2025

CAT 作为服务端项目基础组件,提供了 Java, C/C++, Node.js, Python, Go 等多语言客户端,已经在美团点评的基础架构中间件框架(MVC框架,RPC框架,数据库框架,缓存框架等,消息队列,配置系统等)深度集成,为美团点评各业务线提供系统丰富的性能指标、健康状况、实时告警等。

Java 18,953 5,441 Updated Jan 4, 2025

Logstash - transport and process your logs, events, or other data

Java 14,689 3,519 Updated Oct 27, 2025

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…

Java 14,126 3,857 Updated Oct 26, 2025

Tink is a multi-language, cross-platform, open source library that provides cryptographic APIs that are secure, easy to use correctly, and hard(er) to misuse.

Java 13,555 1,180 Updated Apr 17, 2024

AWS Service registry for resilient mid-tier load balancing and failover.

Java 12,644 3,778 Updated Jul 22, 2025

The Clojure programming language

Java 10,745 1,461 Updated Sep 25, 2025

A simple expressive web framework for java. Spark has a kotlin DSL https://github.com/perwendel/spark-kotlin

Java 9,662 1,569 Updated Oct 8, 2023

Apache Cassandra®

Java 9,447 3,783 Updated Oct 27, 2025

Checkstyle is a development tool to help programmers write Java code that adheres to a coding standard. By default it supports the Google Java Style Guide and Sun Code Conventions, but is highly co…

Java 8,718 3,881 Updated Oct 27, 2025

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

Java 8,562 3,434 Updated Oct 27, 2025

A fast build system that encourages the creation of small, reusable modules over a variety of platforms and languages.

Java 8,556 1,144 Updated Oct 25, 2023

A programmer-oriented testing framework for Java — ⚠️ maintenance mode

Java 8,528 3,292 Updated Jun 24, 2025

Efficient reliable UDP unicast, UDP multicast, and IPC message transport

Java 8,196 969 Updated Oct 27, 2025

Tools for keeping your cloud operating in top form. Chaos Monkey is a resiliency tool that helps applications tolerate random instance failures.

Java 7,984 1,131 Updated Dec 18, 2018

📈 Capturing JVM- and application-level metrics. So you know what's going on.

Java 7,856 1,802 Updated Oct 27, 2025

GoCD - Continuous Delivery server main repository

Java 7,322 980 Updated Oct 27, 2025

Tutorials for using RabbitMQ in various ways

Java 6,825 3,576 Updated Oct 23, 2025

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

Java 6,574 2,834 Updated Oct 26, 2025

Apache Pinot - A realtime distributed OLAP datastore

Java 5,934 1,425 Updated Oct 27, 2025

Apache Calcite

Java 4,974 2,447 Updated Oct 27, 2025
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