Spring Boot helps you to create Spring-powered, production-grade applications and services with absolute minimum fuss.
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The java implementation of Apache Dubbo. An RPC and microservice framework.
Platform to build admin panels, internal tools, and dashboards. Integrates with 25+ databases and any API.
A browser automation framework and ecosystem.
A distributed task scheduling framework.（分布式任务调度平台XXL-JOB）
Desktop/Android/HTML5/iOS Java game development framework
MyBatis SQL mapper framework for Java
Most popular Mocking framework for unit tests written in Java
Logstash - transport and process your logs, events, or other data
LangChain4j is an idiomatic, open-source Java library for building LLM-powered applications on the JVM. It offers a unified API over popular LLM providers and vector stores, and makes implementing tool calling (including MCP support), agents and RAG easy. It integrates seamlessly with enterprise Java frameworks like Quarkus and Spring Boot.
Flexible level editor
The Community Maintained High Velocity Web Framework For Java and Scala.
A scalable web crawler framework for Java.
Apereo CAS - Identity & Single Sign On for all earthlings and beyond.
Agentic AI Framework for Java Developers
A distributed transaction framework, supports workflow, saga, tcc, xa, 2-phase message, outbox patterns, supports many languages.
A damn simple library for building production-ready RESTful web services.
[Examples] Simple basic isolated apps, for budding flutter devs.
Apache Camel is an open source integration framework with 350+ connectors. Write routes in Java, YAML, or XML. Run on Spring Boot, Quarkus, or standalone. Apache License 2.0.
📌 异步线程池框架，支持线程池动态变更&监控&报警，无需修改代码轻松引入。Asynchronous thread pool framework, support Thread Pool Dynamic Change & monitoring & Alarm, no need to modify the code easily introduced.
Picocli is a modern framework for building powerful, user-friendly, GraalVM-enabled command line apps with ease. It supports colors, autocompletion, subcommands, and more. In 1 source file so apps can include as source & avoid adding a dependency. Written in Java, usable from Groovy, Kotlin, Scala, etc.
An API Gateway built on Spring Framework and Spring Boot providing routing and more.
Java / JavaFX / Kotlin Game Library (Engine)
The Leading Security Assessment Framework for Android.