KlayGE's source package doesn't contain the code of 3rd party libraries. They are downloaded during the build process.
7z from Igor Pavlov, under the LGPL License.
Android native app glue from The Android Open Source Project, under the Apache License.
Assimp from assimp team, under the BSD 3-Clause License.
Boost from Boost.org, under the Boost Software License 1.0.
Cxxopts from Jarryd Beck, under the MIT License.
D3dcompiler from Microsoft Corporation, under the Microsoft Software License Terms.
DirectX-Headers from Microsoft Corporation, under the MIT License.
Dxsdk from Microsoft Corporation, under the Microsoft Software License Terms.
Fmt from Victor Zverovich, under the MIT License.
FreeImage from FreeImage team, under the FreeImage Public License 1.0.
Freetype from David Turner, Robert Wilhelm, and Werner Lemberg, under the The FreeType Project LICENSE.
Googletest from Google Inc., under the BSD 3-Clause License.
Libogg from Xiph.org Foundation, under the BSD 3-Clause License.
Libvorbis from Xiph.org Foundation, under the BSD 3-Clause License.
Nanosvg from Mikko Mononen, under the zlib License.
Openal-soft from kcat, under the LGPL License.
Python from Python Software Foundation, under the PSF License Agreement.
Python-cmake-buildsystem from python-cmake-buildsystem team, under the Apache License 2.0.
Rapidjson from THL A29 Limited, a Tencent company, and Milo Yip, under the MIT License.
Rapidxml from Marcin Kalicinski, under the MIT License.
Scope-lite from Martin Moene, under the Boost Software License 1.0.
Wpftoolkit from Xceed Software, Inc., under the Community License Agreement.
Zlib from Jean-loup Gailly and Mark Adler, under the zlib License.