YunaiV / ruoyi-vue-pro

Chinese-language full-stack admin platform (Spring Boot + Vue) with RBAC, multi-tenancy, workflow, payments, mall, CRM/ERP modules, and WeChat mini-program support.

dbeaver / dbeaver

Free multi-platform desktop SQL client and database tool supporting any JDBC or ODBC database.

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.

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.

StarRocks / starrocks

The world's fastest open query engine for sub-second analytics both on and off the data lakehouse. With the flexibility to support nearly any scenario, StarRocks provides best-in-class performance for multi-dimensional analytics, real-time analytics, and ad-hoc queries. A Linux Foundation project.

ArcadeData / arcadedb

ArcadeDB Multi-Model Database, one DBMS that supports SQL, Cypher, Gremlin, HTTP/JSON, MongoDB and Redis. ArcadeDB is a conceptual fork of OrientDB, the first Multi-Model DBMS. ArcadeDB supports Vector Embeddings.

GrapheneOS / Auditor

Hardware-based attestation and intrusion detection app for Android. It provides both local verification with another Android device via QR codes and optional scheduled server-based verification with support for alert emails. It uses hardware-backed keys and attestation support as the foundation and chains trust to the app for software checks.

PBH-BTN / PeerBanHelper

Automatically block unwanted, leeches and abnormal BT peers with support for customized and cloud rules.| BT 反吸血工具 - 自动封禁不受欢迎、吸血和异常的 BT 客户端，并支持自定义规则。支持 qB/qBEE/Deluge/BiglyBT/BitComet

JFormDesigner / FlatLaf

FlatLaf - Swing Look and Feel (with Darcula/IntelliJ themes support)

power721 / alist-tvbox

AList proxy server for TvBox, support playlist and search.

sanluan / PublicCMS

More than 2.7 million lines of code modification continuously iterated for 10 years to modernize java cms, easily supporting tens of millions of data, tens of millions of PV; Support static, server side includes; Currently has 0.0005% of the world's users (w3techs provided data), language support in Chinese, Japanese, English

datavane / tis

Support agile Ontology DataOps Based on Flink, DataX and Flink-CDC with Web-UI

booklore-app / booklore

BookLore: A self-hosted, multi-user digital library with smart shelves, auto metadata, Kobo & KOReader sync, BookDrop imports, OPDS support, and a built-in reader for EPUB, PDF, and comics.

mateaix / mateclaw

🤖 MateClaw — Your second brain with Multi-Agent Orchestration, MCP Protocol, Skills & Memory, Dream, and Multi-Channel Support. Built on Spring AI Alibaba.

devlive-community / metaforge

DataCap is integrated software for data transformation, integration, and visualization. Support a variety of data sources, file types, big data related database, relational database, NoSQL database, etc. Through the software can realize the management of multiple data sources, the data under the source of various operations conversion ...

valkey-io / valkey-glide

An open source Valkey client library that supports Valkey, and Redis open source 6.2, 7.0 and 7.2. Valkey GLIDE is designed for reliability, optimized performance, and high-availability, for Valkey and Redis OSS based applications. GLIDE is a multi language client library, written in Rust with programming language bindings, such as Java and Python

MoshiCoCo / Apple-Monitor

Apple store inventory monitoring tool implemented in Java, supporting Bark, Feishu, Lark robot and other message push methods. Currently supports monitoring Apple stores in mainland China, Hong Kong, Macau, China Taiwan, Japan and other regions.

CarGuo / GSYVideoPlayer

Video players (IJKplayer, ExoPlayer, MediaPlayer), HTTPS, 16k page size, danmaku (bullet chat) support, external subtitles, support for filters, watermarks, and GIF screenshots, pre-roll and mid-roll ads, multiple simultaneous playback, basic seeking/dragging, volume and brightness adjustment, play-while-cache support

Tencent / tinker

Tinker is a hot-fix solution library for Android, it supports dex, library and resources update without reinstall apk.

asLody / VirtualApp

Virtual Engine for Android(Support 14.0 in business version)

signalapp / Signal-Server

Server supporting the Signal Private Messenger applications on Android, Desktop, and iOS

checkstyle / checkstyle

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 configurable. It can be invoked with an ANT task and a command line program.

lightbend / config

configuration library for JVM languages using HOCON files

orientechnologies / orientdb

OrientDB is the most versatile DBMS supporting Graph, Document, Reactive, Full-Text and Geospatial models in one Multi-Model product. OrientDB can run distributed (Multi-Master), supports SQL, ACID Transactions, Full-Text indexing and Reactive Queries.

mock-server / mockserver-monorepo

MockServer is an HTTP(S) mock server and proxy for testing that lets you mock APIs, inspect and modify live traffic, and inject failures. It supports HTTP/1.1, HTTP/2, gRPC, WebSockets, TCP and more on a single port, with additional support for HTTP/3, message brokers, and AI/LLM APIs.

jitsi / jitsi

Jitsi is an audio/video and chat communicator that supports protocols such as SIP, XMPP/Jabber, IRC and many other useful features.

jetty / jetty.project

Eclipse Jetty® - Web Container & Clients - supports HTTP/3, HTTP/2, HTTP/1, websocket, servlets, and more

getActivity / Toaster

Android 吐司框架，专治 Toast 各种疑难杂症

apache / hugegraph

A graph database that supports more than 100+ billion data, high performance and scalability (Include OLTP Engine & REST-API & Backends)

androidx / media

Jetpack Media3 support libraries for media use cases, including ExoPlayer, an extensible media player for Android

spring-projects / spring-data-elasticsearch

Provide support to increase developer productivity in Java when using Elasticsearch. Uses familiar Spring concepts such as a template classes for core API usage and lightweight repository style data access.

opensolon / solon

🔥 Java enterprise application development framework for full scenario: Restrained, Efficient, Open, Ecologicalll!!! 700% higher concurrency 50% memory savings Startup is 10 times faster. Packing 90% smaller; Compatible with java8 ~ java26; Supports LTS. (Replaceable spring)

apache / casbin-jcasbin

An authorization library that supports access control models like ACL, RBAC, ABAC in Java

jOOQ / jOOL

jOOλ - The Missing Parts in Java 8 jOOλ improves the JDK libraries in areas where the Expert Group's focus was elsewhere. It adds tuple support, function support, and a lot of additional functionality around sequential Streams. The JDK 8's main efforts (default methods, lambdas, and the Stream API) were focused around maintaining backwards compatibility and implementing a functional API for parallelism.

spring-projects / spring-data-redis

Provides support to increase developer productivity in Java when using Redis, a key-value store. Uses familiar Spring concepts such as a template classes for core API usage and lightweight repository style data access.

dingodb / dingo

A multi-modal vector database that supports upserts and vector queries using unified SQL (MySQL-Compatible) on structured and unstructured data, while meeting the requirements of high concurrency and ultra-low latency.

spring-projects / spring-data-mongodb

Provides support to increase developer productivity in Java when using MongoDB. Uses familiar Spring concepts such as a template classes for core API usage and lightweight repository style data access.

spring-projects / spring-integration

Spring Integration provides an extension of the Spring programming model to support the well-known Enterprise Integration Patterns (EIP)

spring-cloud / spring-cloud-openfeign

Support for using OpenFeign in Spring Cloud apps

bbottema / simple-java-mail

Simple API, Complex Emails (Jakarta Mail smtp wrapper)

hivemq / hivemq-community-edition

HiveMQ CE is a Java-based open source MQTT broker that fully supports MQTT 3.x and MQTT 5. It is the foundation of the HiveMQ Enterprise Connectivity and Messaging Platform

mybatis / mybatis-dynamic-sql

SQL DSL (Domain Specific Language) for Kotlin and Java. Supports rendering for MyBatis or Spring JDBC Templates

hivemq / hivemq-mqtt-client

HiveMQ MQTT Client is an MQTT 5.0 and MQTT 3.1.1 compatible and feature-rich high-performance Java client library with different API flavours and backpressure support

SonarOpenCommunity / sonar-cxx

SonarQube C++ Community plugin (cxx plugin): This plugin adds C++ support to SonarQube with the focus on integration of existing C++ tools.

dromara / jquick-curl

jquick‑curl: Java library to run raw curl commands, support copy‑paste curl from Postman/Apifox/Browser DevTools, no need to write HTTP client code.

spring-projects / spring-hateoas

Spring HATEOAS - Library to support implementing representations for hyper-text driven REST web services.

dnsjava / dnsjava

dnsjava - an implementation of the DNS protocol in Java

networknt / json-schema-validator

A fast Java JSON schema validator that supports draft V4, V6, V7, V2019-09 and V2020-12

agents-flex / agents-flex

Agents-flex is A lightweight Java AI agent development framework (positioned as a counterpart to Spring AI). It supports features such as RAG, MCP, Skills, Text2SQL , LLM Wiki, Sub-agents, Web Search, TTS (synchronous and streaming), and STT.

AthenZ / athenz

Open source platform for X.509 certificate based service authentication and fine grained access control in dynamic infrastructures. Athenz supports provisioning and configuration (centralized authorization) use cases as well as serving/runtime (decentralized authorization) use cases.

spring-projects / spring-tools

The next generation of tooling for Spring Boot, including support for Cloud Foundry manifest files, Concourse CI pipeline definitions, BOSH deployment manifests, and more... - Available for Visual Studio Code, Cursor, Eclipse, and Theia

lucee / Lucee

Lucee is a high-performance, open-source CFML server written in Java. Supporting JDBC, Caching, Parallelism, HTTP, ORM, REST, S3 and dynamic Java integration, Lucee is great for developers aiming to build fast, scalable applications, delivering faster startup, rapid compilation and better runtime performance.

payara / Payara

Payara Server is an open source middleware platform that supports reliable and secure deployments of Java EE (Jakarta EE) and MicroProfile applications in any environment: on premise, in the cloud or hybrid.

Erudika / scoold

The Stack Overflow clone for your team (self-hosted or hosted)

JetBrains / js-graphql-intellij-plugin

GraphQL language support for WebStorm, IntelliJ IDEA and other IDEs based on the IntelliJ Platform.

spring-projects / spring-data-neo4j

Provide support to increase developer productivity in Java when using Neo4j. Uses familiar Spring concepts such as a template classes for core API usage and lightweight repository style data access.

spring-projects / spring-amqp

Spring AMQP - support for Spring programming model with AMQP, especially but not limited to RabbitMQ

dromara / Omega-AI

Omega-AI is a Java-based deep learning framework that helps you quickly build neural networks for inference and training. Its engine supports automatic differentiation, multithreading, and GPU acceleration with CUDA and cuDNN.

bernie-g / geckolib

GeckoLib is an animation engine for Minecraft mods, with support for complex 3D keyframe-based animations, numerous easings, concurrent animation support, sound and particle keyframes, event keyframes, math-based animations, and more. Available for all major modloaders.

OWASP-Benchmark / BenchmarkJava

OWASP Benchmark is a test suite designed to verify the speed and accuracy of software vulnerability detection tools. A fully runnable web app written in Java, it supports analysis by Static (SAST), Dynamic (DAST), and Runtime (IAST) tools that support Java. The idea is that since it is fully runnable and all the vulnerabilities are actually exploitable, it’s a fair test for any kind of vulnerability detection tool. For more details on this project, please see the OWASP Benchmark Project home page.