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Apache ZooKeeper

Flexible level editor

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.

:tropical_fish: Beats - Lightweight shippers for Elasticsearch & Logstash

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.

This is a collection of tutorials for learning how to use Docker with various tools. Contributions welcome.

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

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

Continuous Inspection

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

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

cuDF - GPU DataFrame Library

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

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

WebGoat is a deliberately insecure application

A complete web conferencing system for virtual classes and more!

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)

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.

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

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

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

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.

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

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.

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.

The Open Source Feature Store for AI/ML