java

The Apache Tika toolkit detects and extracts metadata and text from over a thousand different file types (such as PPT, XLS, and PDF).

Phoenix Pull-to-Refresh

The Apache Guacamole proxy daemon (guacd), C API (libguac), and protocol support.

🔥 xCrash provides the Android app with the ability to capture java crash, native crash and ANR. No root permission or any system permissions are required.

APKUpdater is an open source tool that simplifies the process of finding updates for your installed apps.

Official ProtonVPN Android app

Shopizer java e-commerce software

A better compressed bitset in Java: used by Apache Spark, Netflix Atlas, Apache Pinot, Tablesaw, and many others

Terasology - open source voxel world

:palm_tree::octocat:A simple & beautiful blogging system implemented with spring-boot & thymeleaf & mybatis My Blog 是由 SpringBoot + Mybatis + Thymeleaf 等技术实现的 Java 博客系统，页面美观、功能齐全、部署简单及完善的代码，一定会给使用者无与伦比的体验

Kafka GUI for Apache Kafka to manage topics, topics data, consumers group, schema registry, connect and more...

Maestro: Netflix’s Workflow Orchestrator

You can easily add awesome animated context menu to your app.

SmartAdmin国内首个以「高质量代码」为核心，「简洁、高效、安全」快速开发平台；基于SpringBoot2/3 + Sa-Token + Mybatis-Plus 和 Vue3 + Vite5 + Ant Design Vue 4.x (同时支持JavaScript和TypeScript双版本)；满足国家三级等保要求、支持登录限制、接口数据国产加解密、高防SQL注入等一系列安全体系。

A production-grade java implementation of RAFT consensus algorithm.

Java libraries for writing microservices

Java开发及面试（个人面试、工作总结、资料收集站）

OpenAPI based HTTP Client code generator

Micro second messaging that stores everything to disk

Portable AI agent runtime for the JVM. One @Agent class runs on Spring AI, LangChain4j, Anthropic, or 9 more behind one SPI. Token streaming, tool calls, human approvals, and governance over WebSocket, SSE, gRPC, or WebTransport/HTTP3. Speaks MCP, A2A, and AG-UI.