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「Java学习+面试指南」一份涵盖大部分 Java 程序员所需要掌握的核心知识。准备 Java 面试，首选 JavaGuide！
Design patterns implemented in Java
Free and Open Source, Distributed, RESTful Search Engine
RxJava – Reactive Extensions for the JVM – a library for composing asynchronous and event-based programs using observable sequences for the Java VM.
Netty project - an event-driven asynchronous network application framework
A distributed task scheduling framework.（分布式任务调度平台XXL-JOB）
APM, Application Performance Monitoring System
Redisson - Valkey & Redis Java client. Real-Time Data Platform. Sync/Async/RxJava/Reactive API. Over 50 Valkey and Redis based Java objects and services: Set, Multimap, SortedSet, Map, List, Queue,…
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)
Apache RocketMQ is a cloud native messaging and streaming platform, making it simple to build event-driven applications.
光 HikariCP・A solid, high-performance, JDBC connection pool at last.
Empowering Data Intelligence with Distributed SQL for Sharding, Scalability, and Security Across All Databases.
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。
High Performance Inter-Thread Messaging Library
🚌 The IK Analysis plugin integrates Lucene IK analyzer into Elasticsearch and OpenSearch, support customized dictionary.
Microservice Architecture with Spring Boot, Spring Cloud and Docker
Admin UI for administration of spring boot applications
MeterSphere 是新一代的开源持续测试工具，让软件测试工作更简单、更高效，不再成为持续交付的瓶颈。
Change data capture for a variety of databases. Please log issues at https://issues.redhat.com/browse/DBZ.
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 …
spring cloud + vue + oAuth2.0全家桶实战，前后端分离模拟商城，完整的购物流程、后端运营平台，可以实现快速搭建企业级微服务项目。支持微信登录等三方登录。
Spinnaker is an open source, multi-cloud continuous delivery platform for releasing software changes with high velocity and confidence.