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Apache ZooKeeper

Flexible level editor

:tropical_fish: Beats - Lightweight shippers for Elasticsearch & Logstash

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.

Open-Source Web UI for Apache Kafka Management

Super simple build framework with fast, repeatable builds and an instantly familiar syntax – like Dockerfile and Makefile had a baby.

OpenRefine is a free, open source power tool for working with messy data and improving it

Continuous Inspection

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

Developer-friendly OSS embedded retrieval library for multimodal AI. Search More; Manage Less.

YugabyteDB - the cloud native distributed SQL database for mission-critical applications.

cuDF - GPU DataFrame Library

highlight.io: The open source, full-stack monitoring platform. Error monitoring, session replay, logging, distributed tracing, and more.

A complete web conferencing system for virtual classes and more!

A fast, scalable, high performance Gradient Boosting on Decision Trees library, used for ranking, classification, regression and other machine learning tasks for Python, R, Java, C++. Supports computation on CPU and GPU.

An Application Framework for AI Engineering

搜狐视频(sohu tv)Redis私有云平台 ：支持Redis多种架构(Standalone、Sentinel、Cluster)高效管理、有效降低大规模redis运维成本，提升资源管控能力和利用率。平台提供快速搭建/迁移，运维管理，弹性伸缩，统计监控，客户端整合接入等功能。(CacheCloud is a Redis cloud management platform. It supports Standalone, Sentinel, and Cluster architectures for Redis, effectively reducing large-scale Redis operation and maintenance costs, and improving resource management and utilization. The platform provides rapid construction/migration, operation and maintenance management, elastic scaling, statistical monitoring, client integration and access and other functions)

An open-source storage framework that enables building a Lakehouse architecture with compute engines including Spark, PrestoDB, Flink, Trino, and Hive and APIs

Multi-platform SDK for integrating GitHub Copilot Agent into apps and services

Apache ShenYu is a Java native API Gateway for service proxy, protocol conversion and API governance.

A damn simple library for building production-ready RESTful web services.

Enterprise-grade, commercial-friendly agentic workflow platform for building next-generation SuperAgents.

A polyglot document intelligence framework with a Rust core. Extract text, metadata, images, and structured information from PDFs, Office documents, images, and 97+ formats. Available for Rust, Python, Ruby, Java, Go, PHP, Elixir, C#, R, C, TypeScript (Node/Bun/Wasm/Deno)- or use via CLI, REST API, or MCP server.

Free and open log management

An AI-powered next-generation open source real-time observability system.

一站式云原生实时流数据平台，通过0侵入、插件化构建企业级Kafka服务，极大降低操作、存储和管理实时流数据门槛

Java DSL for easy testing of REST services

The Open Source Feature Store for AI/ML

微信机器人，可接入DeepSeek、Gemini、ChatGPT、ChatGLM、讯飞星火、Tigerbot等大模型。微信 hook WeChat Robot Hook.

Gephi - The Open Graph Viz Platform