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The most powerful and modular diffusion model GUI, api and backend with a graph/nodes interface. The fastest local inference engine in the world.

A cross-platform music app using YouTube Music for backend

本项目为xiaozhi-esp32提供后端服务，帮助您快速搭建ESP32设备控制服务器。Backend service for xiaozhi-esp32, helps you quickly build an ESP32 device control server.

Payload is the open-source, fullstack Next.js framework, giving you instant backend superpowers. Get a full TypeScript backend and admin panel instantly. Use Payload as a headless CMS or for building powerful applications.

Mealie is a self hosted recipe manager and meal planner with a RestAPI backend and a reactive frontend application built in Vue for a pleasant user experience for the whole family. Easily add recipes into your database by providing the url and mealie will automatically import the relevant data or add a family recipe with the UI editor

Check if an email address exists without sending any email, written in Rust. Comes with a ⚙️ HTTP backend.

The flexible backend for all your projects 🐰 Turn your DB into a headless CMS, admin panels, or apps with a custom UI, instant APIs, auth & more.

Scalable open-source game backend server: multiplayer, matchmaking, leaderboards, chat, and social features for games.

Native LLM inference server for Apple Silicon. OpenAI + Anthropic API compatible. No Python. Zig backend, Swift frontend macOS app with chat, music, voice, video generation.

Self-hosted media streaming server with a Go backend, React web UI, Docker deployment, transcoding, and Jellyfin-compatible APIs.

Multi-account proxy for Claude Code and Codex: pools Claude Max, ChatGPT/Codex, API-key and third-party backend accounts, and rotates on quota

Open Source Routing Machine - C++ backend

The open-source reactive database for app developers

Batteries-included backend that works with any stack.

Instant messaging platform. Backend in Go. Clients: Swift iOS, Java Android, JS webapp, scriptable command line; chatbots

backend, web frontend, etc.

Gemini Web provider for Magpie with a local backend and experimental Argon support

A comprehensive open-source reference for backend engineering HTTP, concurrency, gRPC, distributed systems, observability, and cloud-native deployment. Built from first principles.

xdg-desktop-portal backend for Hyprland

OPNsense GUI, API and systems backend

OIDC connect user backend for Nextcloud

Routes Minecraft client connections to backend servers based upon the requested server address

Koog is a JVM (Java and Kotlin) framework for building predictable, fault-tolerant and enterprise-ready AI agents across all platforms – from backend services to Android and iOS, JVM, and even in-browser environments. Koog is based on our AI products expertise and provides proven solutions for complex LLM and AI problems

Aquamarine is a very light linux rendering backend library

🦔 Fast, lightweight & schema-less search backend. An alternative to Elasticsearch that runs on a few MBs of RAM.

high-performance rendering backend (C++, Python, C#, Java)

Instant REST and MCP APIs for PostgreSQL and MySQL, on existing or new databases. CRUD, custom SQL routes, auth and ACL without writing a backend. Low-code, ⚡ realtime, high-performance. Native MySQL support since v2.5

Full-screen text for any screen. The message lives in the URL, so there's no backend, accounts or storage.

Multi-backend recommender systems with Keras 3

Rust crate for implementing FUSE backends