Tallow is open source under the MIT licence, and it is built on other open-source work. This page lists what the engine, its downloads and this website include, and the licence of each.
Tallow
The engine, the editor and Tallow Manager are released under the MIT licence. You can use them for any project, commercial or not, without fees or royalties. Keep the copyright notice with copies of the engine itself; the games you make are yours.
Included in the engine and in every game built with it
Built games carry these licences in a THIRD_PARTY_LICENSES.txt beside the game, so nothing extra is needed to follow them. The full licence texts are in the engine’s repository.
| Library | Used for | Licence |
|---|---|---|
| bgfx, bx, bimg | Rendering, images | BSD 2-Clause |
| SDL 3 | Windows, input and gamepads | zlib |
| Jolt Physics | Physics | MIT |
| JoltC | C interface to Jolt | MIT |
| Flecs | Entity component system (0.2) | MIT |
| Recast & Detour | Navigation meshes and paths | zlib |
| ENet | Network transport | MIT |
| miniaudio | Audio | Public domain or MIT No Attribution |
| Opus | Voice chat codec | BSD 3-Clause, with royalty-free patent licences |
| Dear ImGui, cimgui | Editor and debug interface | MIT |
| ImGuizmo | Editor gizmos | MIT |
| ImGuiColorTextEdit | Code editor view | MIT |
| cgltf | glTF model loading | MIT |
| Assimp | Editor model import (FBX, OBJ, DAE, STL, PLY, 3DS) | BSD 3-Clause (and the licences of its parts) |
| stb | Image and font loading | MIT or public domain |
| KEMAR HRTF measurements | Headphone 3D audio | Free to use with citation: Gardner, W. G. and Martin, K. D. (1995), MIT Media Lab |
Tools the launcher and Tallow Manager can install
These are only needed to edit and build games, and they are not part of the games you ship.
| Tool | Licence |
|---|---|
| Beef compiler (Linux build hosted by Tallow) | MIT; its bundled LLVM libraries are Apache 2.0 with LLVM exceptions |
| Python (from python-build-standalone) | Python Software Foundation Licence, and the licences of the libraries it includes |
| Microsoft C++ Build Tools (Windows) | Installed from Microsoft under Microsoft’s own licence terms |
This website
| Software | Licence |
|---|---|
| WordPress | GPL version 2 or later |
| bbPress (forums) | GPL version 2 or later |
| The Tallow theme and site plugin | MIT |
The site uses your system’s own fonts and loads no outside fonts or trackers. Avatars come from GitHub for members who sign in with it. Spotted something missing? Open an issue.