Usagi is released under the MIT License.
The license can be found here, and it grants permission to use Usagi for any purpose so long as the license file is distributed along side it.
Usagi makes use of a number of third party libraries. Those such as the FBX SDK which do not have licenses which allow re-distribution must be installed seperately.
Below is a list for reference of the third party software included either as part of the distribution or as a submodule. In those cases the corresponding license files are included. The Usagi MIT license does not superceed any of these liceneses. Submodules are forked from the original repositories, please see their history for details of modifications. We have tried to avoid omissions to this list but always check source files and their parent directories to confirm the license of code within this repository.
PhysX (submodule)
Original Authors: NVIDIA Corporation
Website: https://github.com/NVIDIAGameWorks/PhysX
Source Location: Engine/ThirdParty/PhysX
Licensed Under: NVIDIA PhysX SDK 4.1 License
UNICODE (source)
Original Authors: Unicode Inc
Source Location: Engine/ThirdParty/utf.h and utf.cpp
Licensed Under: Unicode License
pugixml parser (source)
Original Authors: Arseny Kapoulkine
Source Location: Tools\Source\Ayataka\lib
Licensed Under: MIT License
SMAA (modified source)
Original Authors: Jorge Jimenez, Jose I. Echevarria, Belen Masia, Fernando Navarro, Diego Gutierrez
Website: https://github.com/iryoku/smaa
Source Location: Data\GLSL\shaders\SMAA
Licensed Under: MIT License
FXAA (modified source)
Original Authors: Timothy Lottes
Website: https://docs.nvidia.com/gameworks/content/gameworkslibrary/graphicssamples/d3d_samples/fxaa311sample.htm
Source Location: Data\GLSL\shaders\PostFX fxaa_ps.glsl and fxaa_vs.glsl
Licensed Under: Public Domain
yaml-cpp (submodule)
Original Authors: Jesse Beder.
Website: https://github.com/jbeder/yaml-cpp
Source Location: Engine\ThirdParty\yaml-cpp
Licensed Under: MIT License
nanopb (submodule)
Original Authors: Petteri Aimonen.
Website: https://github.com/metormote/nanopb
Source Location: Engine\ThirdParty\nanopb
Licensed Under: zLib License
msdfgen (submodule)
Original Authors: Viktor Chlumsky.
Website: https://github.com/Chlumsky/msdfgen
Source Location: Engine\ThirdParty\msdfgen
Licensed under: MIT License
LUA (source)
Original Authors: Lua.org, PUC-Rio.
Website: http://www.lua.org/
Source Location: Engine\ThirdParty\lua-5.3.2
Licensed under: MIT License
Khronos OpenGL Registry (source)
Original Authors: The Khronos Group Inc.
Website: https://www.khronos.org/registry/OpenGL/index_gl.php
Source Location: Engine\ThirdParty\khronos
Licensed under: MIT License
imgui (submodule)
Original Authors: Omar Cornut and ImGui contributors
Website: https://github.com/ocornut/imgui
Source Location: Engine\ThirdParty\imgui
Licensed under: MIT License
glew (source)
Original Authors: Nigel Stewart, Milan Ikits, Marcelo E. Magallon, Lev Povalahev
Website: http://glew.sourceforge.net/index.html
Source Location: Engine\ThirdParty\glew
Licensed under: Modified BSD License, the Mesa 3-D License (MIT) and the Khronos License (MIT).
EASTL (submodule)
Original Authors: Electronic Arts Inc.
Website: https://github.com/electronicarts/EASTL
Source Location: Engine\ThirdParty\EASTL
Licensed under: Modified BSD License
protobuf-net (binary)
Original Authors: Google, .NET implementation Marc Gravell
Binary Location: Tools\protobuf-net
Licensed under: BSD license and .NET implementation with Apache License, Version 2.0
gli (submodule)
Original Authors: G-Truc Creation
Website: https://github.com/g-truc/gli
Source Location: Engine\ThirdParty\gli
Licensed under: Happy Bunny license
Adaptive Screen Space Ambient Occlusion (modified source)
Original Authors: Filip Strugar (Intel)
Website: https://github.com/GameTechDev/ASSAO
Source Location: Data\GLSL\shaders\ASSAO
Licensed under: MIT License