blender/intern/cycles/doc/license
..
Apache_2.0.txt
Boost.txt
CMakeLists.txt
ILM.txt
NVidia.txt
OSL.txt
readme.txt
Sobol.txt

This program uses code from various sources, the default license is Apache 2.0
for all code, with the following exceptions.

Modified BSD License
* Code adapated from Open Shading Language
* Sobol direction vectors
* Matrix inversion code from OpenEXR
* MD5 Hash code

MIT license
* Approximate Catmull Clark subdivision code

Boost License
* Boost and OpenCL dynamic loading