YunaiV / ruoyi-vue-pro
🔥 官方推荐 🔥 RuoYi-Vue 全新 Pro 版本，优化重构所有功能。基于 Spring Boot + MyBatis Plus + Vue & Element 实现的后台管理系统 + 微信小程序，支持 RBAC 动态权限、数据权限、SaaS 多租户、Flowable 工作流、三方登录、支付、短信、商城、CRM、ERP、MES、IM、AI 大模型、IoT 物联网等功能。你的 ⭐️ Star ⭐️，是作者生发的动力！
YunaiV / ruoyi-vue-pro
iluwatar / java-design-patterns
Design patterns implemented in Java
TheAlgorithms / Java
All Algorithms implemented in Java
apache / dubbo
The java implementation of Apache Dubbo. An RPC and microservice framework.
halo-dev / halo
Halo 是一款强大易用的开源建站工具，从个人博客、知识库，到企业官网、在线商城，Halo 都能助您轻松实现，一站式满足您的多样化建站需求。
keycloak / keycloak
Open Source Identity and Access Management For Modern Applications and Services
alibaba / nacos
an easy-to-use dynamic service discovery, configuration and service management platform for building AI cloud native applications.
conductor-oss / conductor
Conductor is an event driven agentic workflow engine providing durable and highly resilient execution engine for applications and AI Agents
apolloconfig / apollo
Apollo is a reliable configuration management system suitable for microservice configuration management scenarios.
OtterMind / Chat2DB
Chat2DB is a free, cross-platform, local-first database client and SQL workspace for developers, DBAs, analysts, and data teams. Connect to 40+ databases, manage data, edit and run SQL, and use your own AI model to generate, explain, and optimize queries. Available on desktop, web, Docker, and CLI, with MCP support.
apache / skywalking
APM, Application Performance Monitoring System
thingsboard / thingsboard
All-in-one IoT Platform - Device management, data collection, processing and visualization.
YunaiV / yudao-cloud
ruoyi-vue-pro 全新 Cloud 版本，优化重构所有功能。基于 Spring Cloud Alibaba + MyBatis Plus + Vue & Element 实现的后台管理系统 + 用户小程序，支持 RBAC 动态权限、多租户、数据权限、工作流、三方登录、支付、短信、商城、CRM、ERP、MES、IM、AI 大模型、IoT 物联网等功能。你的 ⭐️ Star ⭐️，是作者生发的动力！
questdb / questdb
QuestDB is a high performance, open-source, time-series database
supertokens / supertokens-core
Open source alternative to Auth0 / Firebase Auth / AWS Cognito
microg / GmsCore
Free implementation of Play Services
pinpoint-apm / pinpoint
APM, (Application Performance Management) tool for large-scale distributed systems.
langchain4j / langchain4j
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.
apache / zookeeper
Apache ZooKeeper
grpc / grpc-java
The Java gRPC implementation. HTTP/2 based RPC
Activiti / Activiti
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 engine for Java. It's open-source and distributed under the Apache license. Activiti runs in any Java application, on a server, on a cluster or in the cloud. It integrates perfectly with Spring, it is extremely lightweight and based on simple concepts.
flyway / flyway
Flyway by Redgate • Database Migrations Made Easy.
flowable / flowable-engine
A compact and highly efficient workflow and Business Process Management (BPM) platform for developers, system admins and business users.
apache / shardingsphere-elasticjob
Distributed scheduled job
Graylog2 / graylog2-server
Free and open log management
traccar / traccar
Open source GPS tracking platform - self-hosted or managed, 200+ device protocols
pig-mesh / pig
↥ ↥ ↥ Follow for updates An RBAC permission management system based on Spring Cloud 2025, Spring Boot 4, and OAuth2.
apache / hudi
Upserts, Deletes And Incremental Processing on Big Data.
auth0 / java-jwt
Java implementation of JSON Web Token (JWT)
graphql-java / graphql-java
GraphQL Java implementation
JSQLParser / JSqlParser
JSqlParser parses an SQL statement and translate it into a hierarchy of Java classes. The generated hierarchy can be navigated using the Visitor Pattern
CaffeineMC / sodium
A high-performance rendering engine replacement for Minecraft, which greatly improves frame rates and reduces micro-stutter
bethington / ghidra-mcp
Ghidra MCP Server — 200+ MCP tools for AI-powered reverse engineering. GUI plugin + headless server, lazy tool loading, convention enforcement, batch operations, Ghidra Server integration, and Docker deployment.
ageerle / ruoyi-ai
Enterprise-grade AI agent framework with multi-provider LLM management, secure knowledge bases and high-precision RAG, visual workflow orchestration, and multi-agent coordination.
liquibase / liquibase
Main Liquibase Source
ReChronoRain / HyperCeiler
HyperOS enhancement module - Make HyperOS Great Again!
apache / maven
Apache Maven core
iflytek / skillhub
Self-hosted, open-source agent skill registry for enterprises. Publish & version skill packages, govern with RBAC and audit logs, deploy on-premise with Docker or Kubernetes.
apache / ignite
Apache Ignite
JodaOrg / joda-time
Joda-Time is the widely used replacement for the Java date and time classes prior to Java SE 8.
stleary / JSON-java
A reference implementation of a JSON package in Java.
rememberber / WePush
专注批量推送的小而美的工具，目前支持：模板消息-公众号、模板消息-小程序、微信客服消息、微信企业号/企业微信消息、阿里云短信、阿里大于模板短信 、腾讯云短信、云片网短信、E-Mail、HTTP请求、钉钉、华为云短信、百度云短信、又拍云短信、七牛云短信
apache / shiro
Apache Shiro is a powerful and easy-to-use Java security framework that performs authentication, authorization, cryptography, and session management
freeplane / freeplane
Application for Mind Mapping, Knowledge Management, Project Management. Develop, organize and communicate your ideas and knowledge in the most effective way.
JFormDesigner / FlatLaf
FlatLaf - Swing Look and Feel (with Darcula/IntelliJ themes support)
tronprotocol / java-tron
Java implementation of the Tron whitepaper
FasterXML / jackson-databind
General data-binding package for Jackson: works on streaming API (core) implementation(s)
apache / maven-mvnd
Apache Maven Daemon
jobrunr / jobrunr
An extremely easy way to perform background processing in Java. Backed by persistent storage. Open and free for commercial use.
sepinf-inc / IPED
IPED Digital Forensic Tool. It is an open source software that can be used to process and analyze digital evidence, often seized at crime scenes by law enforcement or in a corporate investigation by private examiners.
cruise-control-for-kafka / cruise-control
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.
88250 / symphony
🎶 一款用 Java 实现的现代化社区（论坛/问答/BBS/社交网络/博客）系统平台。A modern community (forum/Q&A/BBS/SNS/blog) system platform implemented in Java. https://ld246.com
bonigarcia / webdrivermanager
Automated driver management and other helper features for Selenium WebDriver in Java
sonatype / nexus-public
Sonatype Nexus Repository Open-source codebase mirror
mybatis-flex / mybatis-flex
mybatis-flex is an elegant Mybatis Enhancement Framework
dedicatedcode / reitti
Reitti is a comprehensive personal location tracking and analysis application that helps you understand your movement patterns and significant places. The name "Reitti" comes from Finnish, meaning "route" or "path".
open-telemetry / opentelemetry-java-instrumentation
OpenTelemetry auto-instrumentation and instrumentation libraries for Java
open-telemetry / opentelemetry-java
OpenTelemetry Java SDK
metasfresh / metasfresh
We do Open Source ERP - Fast, Flexible & Free Software to scale your Business.
zeromq / jeromq
JeroMQ is a pure Java implementation of the ZeroMQ messaging library, offering high-performance asynchronous messaging for distributed or concurrent applications.