Easiest local model server for prototyping, but a separate install the player must have.
Active (<30d)Last commit 2026-10-18
MITView Tool
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The base runtime most Unity/Unreal/Godot LLM plugins wrap; very active. Start here if you want control.
Active (<30d)Last commit 2026-10-18
MITView Tool
Open-source 2D and 3D engine with its own editor, GDScript and C# support; no royalties or fees.
Active (<30d)Last commit 2026-10-16
MITView Tool
Immediate-mode C++ GUI library, widely used for in-game tools and debug UI.
Active (<30d)Last commit 2026-10-16
MITView Tool
Default offline STT building block; most engine plugins wrap it.
Active (<30d)Last commit 2026-10-12
MITView Tool
Data-driven game engine written in Rust, built around an entity component system.
Active (<30d)Last commit 2026-10-16
Open sourceView Tool
Historic leader with a huge model zoo; inactive since 2024, and some model licences differ.
STALE (>6mo)Last commit 2024-02-10
MPL-2.0View Tool
Official 1-bit LLM inference; interesting for CPU-only NPCs, still niche.
Recent (<6mo)Last commit 2026-07-27
MITView Tool
Fast HTML5 2D game framework with Canvas and WebGL rendering for desktop and mobile browsers.
Recent (<6mo)Last commit 2026-08-21
MITView Tool
Animated sprite editor and pixel-art tool with layers, frames, tags and sprite-sheet export.
Active (<30d)Last commit 2026-10-14
PaidView Tool
Natural conversational voice; AGPL and a slowing cadence.
STALE (>6mo)Last commit 2026-04-10
AGPL-3.0View Tool
Expressive but slow and GPU-hungry; dormant since 2024.
STALE (>6mo)Last commit 2024-04-05
MITView Tool
Small, easy-to-use C library for learning and making videogames, with bindings for many languages.
Active (<30d)Last commit 2026-10-17
ZlibView Tool
Popular character-chat frontend; useful for prototyping personas before building them into a game.
Recent (<6mo)Last commit 2026-09-14
AGPL-3.0View Tool
High quality and very active, but licence is unclear in metadata; read before commercial use.
Active (<30d)Last commit 2026-10-14
FreeView Tool
One-file distribution of models; licence not auto-detected, read it before shipping.
Active (<30d)Last commit 2026-10-08
FreeView Tool
Fast Whisper for servers/tools; not embeddable directly in game engines.
Active (<30d)Last commit 2026-10-16
MITView Tool
Java game development framework for desktop, Android, iOS and HTML5.
Active (<30d)Last commit 2026-10-14
Apache-2.0View Tool
Compiler-based deployment engine for many devices; heavier setup than llama.cpp.
Active (<30d)Last commit 2026-10-06
Apache-2.0View Tool
Free 3D suite for modelling, sculpting, rigging, animation and rendering; exports to all major engines.
Active (<30d)Last commit 2026-10-17
GPLView Tool
Free multi-track audio editor and recorder for cleaning up and editing sound effects and voice-over.
Active (<30d)Last commit 2026-10-16
Open sourceView Tool
Web graphics runtime built on WebGL, WebGPU, WebXR and glTF for browser games and 3D apps.
Active (<30d)Last commit 2026-10-18
MITView Tool
Real-time frame profiler for games and other native applications.
Active (<30d)Last commit 2026-10-17
BSD-3-ClauseView Tool
Cross-platform library for windowing, input, audio and graphics access.
Active (<30d)Last commit 2026-10-18
ZlibView Tool
Strong voice cloning, GPU-heavy; check the model weights licence separately.
Active (<30d)Last commit 2026-10-14
MITView Tool
One toolkit for STT, TTS and VAD with permissive licence; strong pick for on-device voice.
Active (<30d)Last commit 2026-10-17
Apache-2.0View Tool
Light offline recognition that runs on small devices; lower accuracy than Whisper.
Active (<30d)Last commit 2026-10-15
Apache-2.0View Tool
Third-party MIT package that bridges MCP clients to the Unity Editor: manage assets, control scenes, edit scripts and run tests.
Active (<30d)Last commit 2026-10-17
MITView Tool
Git extension for versioning large files such as textures, audio and models.
Active (<30d)Last commit 2026-09-22
MITView Tool
Framework for making cross-platform games in C#, a spiritual successor to Microsoft XNA.
Active (<30d)Last commit 2026-10-11
Ms-PLView Tool
Open-source game backend: accounts, matchmaking, leaderboards, chat and realtime multiplayer.
Active (<30d)Last commit 2026-10-16
Apache-2.0View Tool
Flexible tile-map level editor with exports for many engines and formats.
Active (<30d)Last commit 2026-09-25
Open sourceView Tool
Simple web-based pixel-art and sprite animation editor.
Active (<30d)Last commit 2026-09-20
Apache-2.0View Tool
Simple multimedia library for C++ covering windows, graphics, audio and networking.
Active (<30d)Last commit 2026-10-16
ZlibView Tool
Great one-file local server for roleplay; AGPL is a concern for bundling.
Active (<30d)Last commit 2026-10-18
AGPL-3.0View Tool
Multi-core-friendly rigid-body physics and collision detection library written in C++.
Active (<30d)Last commit 2026-10-16
MITView Tool
Original MIT Piper; archived. Fine to study, but use the maintained fork.
ARCHIVEDLast commit 2025-08-26
MITView Tool
Stand-alone graphics debugger for capturing and inspecting frames.
Active (<30d)Last commit 2026-10-15
MITView Tool
Reference design for multi-agent NPC simulation; a good source of architecture ideas, not an engine plugin.
Recent (<6mo)Last commit 2026-08-26
MITView Tool
Free digital painting application, widely used for concept art, textures and 2D assets.
Active (<30d)Last commit 2026-10-18
GPL-3.0View Tool
Cross-platform music production software for composing game soundtracks.
Active (<30d)Last commit 2026-09-27
GPL-2.0View Tool
Tiny voice-activity detector; pairs with any STT to cut latency.
Active (<30d)Last commit 2026-09-29
MITView Tool
Widely used 2D physics engine for games.
Active (<30d)Last commit 2026-10-04
MITView Tool
Valve's reliable/unreliable UDP messaging with encryption and P2P NAT traversal.
Active (<30d)Last commit 2026-10-02
BSD-3-ClauseView Tool
Cross-platform 2D/3D engine with an editor, popular for mobile and instant web games.
Active (<30d)Last commit 2026-09-21
MITView Tool
Multi-platform 3D engine for games and simulations, hosted by the Linux Foundation community.
Active (<30d)Last commit 2026-10-17
Open sourceView Tool
Small, permissively licensed TTS that is a good fit for NPC voices.
STALE (>6mo)Last commit 2025-08-06
Apache-2.0View Tool
2D game framework for Lua, popular for game jams and small projects.
Active (<30d)Last commit 2026-09-20
zlibView Tool
Fast entity component system for C and C++.
Active (<30d)Last commit 2026-10-16
MITView Tool
Animated sprite editor, a fork of the last GPLv2 commit of Aseprite.
Active (<30d)Last commit 2026-10-15
GPL-2.0View Tool
C# game engine (formerly Xenko) with a visual editor and real-time rendering.
Active (<30d)Last commit 2026-10-17
MITView Tool
Multiplayer framework for Node.js with client SDKs for Unity, Godot and the web.
Active (<30d)Last commit 2026-10-16
MITView Tool
3D game engine with a C#/C++/visual scripting workflow and an editor.
Active (<30d)Last commit 2026-10-15
FreeView Tool
Lightweight engine for 2D and 3D games with Lua scripting, built for desktop, console, mobile and web builds.
Active (<30d)Last commit 2026-10-18
Open sourceView Tool
Open-source networking library for Unity, derived from UNet.
Active (<30d)Last commit 2026-09-19
MITView Tool
MCP server for Godot: launch the editor, run projects, capture debug output and make basic scene and node changes.
STALE (>6mo)Last commit 2026-04-16
MITView Tool
Godot plugin for dialogue, visual novels and character management.
Recent (<6mo)Last commit 2026-08-30
MITView Tool
Procedural texture authoring and 3D model painting tool built on the Godot engine.
Active (<30d)Last commit 2026-10-15
MITView Tool
Active successor to Piper; GPL-3.0 constrains shipping inside a closed game.
Active (<30d)Last commit 2026-10-17
GPL-3.0View Tool
Digital audio workstation for recording, editing and mixing.
Active (<30d)Last commit 2026-10-18
GPL-2.0View Tool
inkle's scripting language for writing interactive narrative, with a Unity integration.
Recent (<6mo)Last commit 2026-05-05
MITView Tool
Modern 2D level editor from the director of Dead Cells; exports JSON with importers for many engines.
Active (<30d)Last commit 2026-10-06
MITView Tool
Reliable UDP networking library used underneath many game networking stacks.
Recent (<6mo)Last commit 2026-06-23
MITView Tool
MCP server and editor tools for Godot that connect MCP clients to a live editor to build scenes, edit nodes and scripts, wire signals and configure UI.
Active (<30d)Last commit 2026-10-03
MITView Tool
Tool for telling interactive, nonlinear stories; good for prototyping narrative.
Active (<30d)Last commit 2026-10-07
GPL-3.0View Tool
Cross-platform brush-based level editor for Quake-style maps.
Active (<30d)Last commit 2026-10-17
GPL-3.0View Tool
Dialogue scripting language and tools for Unity, Unreal and Godot, built for branching narrative.
Active (<30d)Last commit 2026-10-14
MITView Tool
Unity's high-level networking SDK for GameObject/MonoBehaviour workflows.
Active (<30d)Last commit 2026-10-17
FreeView Tool
Unity networking library, positioned as an alternative to Mirror and Netcode.
Active (<30d)Last commit 2026-10-18
FreeView Tool
Simple tool for hand-drawn 2D animation, useful for frame-by-frame sprite animation.
Active (<30d)Last commit 2026-10-16
GPL-2.0View Tool
Most popular Unity local-LLM character plugin; permissive licence. Last push is ~5 months old.
Recent (<6mo)Last commit 2026-04-29
Apache-2.0View Tool
Purpose-built local LLM for game engines, very active; EUPL copyleft needs a licence check.
Active (<30d)Last commit 2026-10-17
EUPL-1.2View Tool
Microsoft's ONNX generative runtime; good fit for Windows/ONNX pipelines.
Active (<30d)Last commit 2026-10-15
MITView Tool
GitHub Actions and tooling for building and testing Unity projects in CI.
Recent (<6mo)Last commit 2026-09-16
MITView Tool
Command-line tool for pushing game builds to itch.io.
Active (<30d)Last commit 2026-10-17
MITView Tool
TypeScript/JavaScript runtime for DragonBones skeletal animations.
STALE (>6mo)Last commit 2025-05-24
MITView Tool
Straightforward Whisper in Unity; no pushes in ~6 months.
STALE (>6mo)Last commit 2025-04-17
MITView Tool
Epic Games' official Claude Code plugin: drive Unreal Editor over MCP with hundreds of tools across 30+ toolsets (actors, Blueprints, materials, Niagara, Control Rigs, Sequencer).
Recent (<6mo)Last commit 2026-09-17
MITView Tool
Browser-based sound effects generator in the sfxr tradition, for quick retro-style SFX.
Recent (<6mo)Last commit 2026-05-05
UnlicenseView Tool
Whisper plugin for Unreal; archived, so use only as a reference.
ARCHIVEDLast commit 2025-02-18
MITView Tool
Well known Godot LLM addon but no pushes since mid-2024; treat as stale.
STALE (>6mo)Last commit 2024-06-23
MITView Tool
Main llama.cpp plugin for UE5; small but maintained.
Active (<30d)Last commit 2026-09-25
MITView Tool
Realtime Godot transcription GDExtension with GPU options; small project.
Recent (<6mo)Last commit 2026-07-20
MITView Tool
Offline Piper TTS inside Unity; unmaintained since 2024.
STALE (>6mo)Last commit 2024-05-29
MITView Tool
Cross-platform 2D and 3D engine with a large asset ecosystem; C# scripting and an editor for desktop, mobile, web and XR.
Closed sourceNo public repository
FreemiumView Tool
Epic's real-time 3D engine with full source access, C++ and Blueprint visual scripting, for high-fidelity games.
Closed sourceNo public repository
FreeView Tool
Adaptive audio middleware with the FMOD Studio authoring tool and an engine with integrations for many game engines.
Closed sourceNo public repository
FreemiumView Tool
2D skeletal animation editor with runtimes for popular engines and frameworks.
Closed sourceNo public repository
PaidView Tool
Embeds an MCP server in Unreal Editor so MCP-compatible clients can drive the editor over local HTTP; toolsets come from the Toolset Registry and All Toolsets plugins.
Closed sourceNo public repository
FreeView Tool
Unity's official MCP server, set up through the Unity CLI, for connecting MCP clients to the Unity Editor. Unity has deprecated the older in-editor MCP server in favour of the CLI.
Closed sourceNo public repository
FreeView Tool
2D game engine and editor, aimed at quick prototyping and shipping 2D games with its GML language.
Closed sourceNo public repository
FreemiumView Tool
Free voxel art editor and GPU path-tracing renderer, with .vox export used by many engines.
Closed sourceNo public repository
FreeView Tool
Interactive audio middleware for designing sound and music behaviour, with integrations for major engines.
Closed sourceNo public repository
FreemiumView Tool
Centralised version control used by studios for large binary assets and big repositories (now branded P4).
Closed sourceNo public repository
FreemiumView Tool
Cloud or on-premises version control built for large files; works with any engine, with a Unity Editor integration.
Closed sourceNo public repository
FreemiumView Tool
Hosted multiplayer networking cloud and SDKs for Unity and other engines.
Closed sourceNo public repository
FreemiumView Tool
CPU profiler for Windows and console development with frame-level timeline views.
Closed sourceNo public repository
PaidView Tool
No tools match these filters.
Stars are GitHub star counts at the 2026-10-18 snapshot, not reviews. Closed-source tools show pricing instead. Stale and archived tools are included and marked.