Horizon

Horizon is an unofficial, open-source reimplementation of Minecraft: Java Edition in Rust. It runs as a native game through the Horizon launcher, reads worlds in Minecraft's format, reproduces vanilla world generation and game rules, and requires the user's own legally obtained copy of Minecraft: Java Edition; it contains no Minecraft code, assets, or data. The project checks behavior against vanilla with differential harnesses and supports single-player worlds, resource and data packs, controller input, optional graphics and navigation features, offline-mode multiplayer, and a Rust-to-WebAssembly mod system. Java mod JARs are not supported. The launcher installs and updates the game, can manage Horizon servers and modpack profiles, and the distribution includes horizon-ctl, a command-line and MCP interface for controlling the game programmatically.

Pumpkin is an open-source Minecraft server written entirely in Rust. It is designed for fast, efficient, customizable hosting, using multithreading and adhering to vanilla game mechanics. The project targets Java Edition and Bedrock Edition clients, although Bedrock support is marked as a work in progress. It provides configuration through TOML and implements Minecraft protocol features including encryption, packet compression, server status and ping, world loading and saving, chunk generation, entity spawning, player movement, inventories, combat, commands, permissions, chat, and plugin support. It also supports RCON, queries, and proxy systems including BungeeCord, BungeeGuard, and Velocity. Pumpkin is under heavy development. The server is licensed under GPLv3; its plugin APIs are dual-licensed under MIT or Apache-2.0.

Horizon is an open-source, AI-powered news radar that collects items from sources such as RSS and Atom feeds, Hacker News, Reddit, Telegram, X, GitHub, financial-news providers, GDELT, Google News, and OSS Insight. It analyzes, scores, filters, and deduplicates items before routing each one to a configurable processing profile. Profiles define scoring criteria and Markdown or JSON output blocks for treatments such as summaries, context, solutions, takeaways, and community discussion; selected items are then grouped into a daily briefing, with optional limits on total items and category shares. Horizon can generate English and Chinese briefings and publish them as Markdown or GitHub Pages content, or deliver them by email, webhook, and WeChat. It runs through a Python CLI or Docker, supports an interactive configuration wizard, scheduled GitHub Actions workflows, and an MCP server and agent skill for assistant-driven configuration and pipeline execution. The project is maintained on GitHub under the MIT license.

netherite is a from-scratch C and CUDA reimplementation of Minecraft 1.11.2, checked against the original Java game. It provides a batched CUDA reinforcement-learning environment in which multiple worlds step in lockstep on one GPU, with semantic-camera observations; the repository reports a recorded batch reaching 7,200 live worlds. Linux x86_64 supports the full build, CUDA training, and Java-oracle workflow, while macOS provides CPU and Metal game backends without CUDA support. The project does not ship Mojang content and requires a legal Minecraft copy and JDK 8.

Rabbet is a from-scratch C++ 3D game engine with a sparse-set entity-component system, versioned entity handles, dense component pools, and a system-and-resource runtime. Its OpenGL 4.1 renderer provides a forward path with metallic-roughness PBR, a Phong fallback, lighting and shadow maps, emissive surfaces, optional image-based lighting, post-processing, CPU particles, and heightmap or noise terrain. The Forge editor provides a dockable ImGui workspace around a render-to-texture viewport, asset thumbnails, hierarchy reparenting, click-to-pick, snapping gizmos, and Play/Pause/Step/Stop controls that snapshot and restore scenes. Assets use stable UUIDs and .import sidecars; models, textures, audio, materials, shaders, prefabs, and scenes are supported, with scenes stored as readable JSON. Lua behaviors run through sol2 with live hot-reload and inspector-editable fields, while physics uses Jolt rigidbodies and audio uses miniaudio. The repository includes the engine, editor, examples, and tests, including the Orb Hunt demo game. It uses CMake 3.24 or later and a C++20 compiler, supports macOS and Linux, fetches pinned dependencies during configuration, and is licensed under Apache License 2.0.