I noticed that one of the 2015 HaD prize submission requirements is documentation of software licenses used in the project. Here they are:

I'm making DOLPi software available under MIT license #(MIT, opensource.org/licenses/MIT).

The following packages are used within DOLPI's Python code:

1. picamera - © Dave Jones. Free use and distribution permitted under conditions stated at: http://picamera.readthedocs.org/en/latest/license.html
2. cv2 - OpenCV is released under a BSD license and hence it’s free for both academic and commercial use.
3. RPi.GPIO, time - Part of Raspbian. Free use and distribution, but a lawyer would be needed to decode the GPL and dozens of other licenses that cover all the packages of Debian (the Raspbian basis)
4. numpy - © The Scipy community. Free for use and distribution permitted under conditions stated at: http://docs.scipy.org/doc/numpy/license.html
5. - © John Hunter, Darren Dale, Eric Firing, Michael Droettboom and the matplotlib development team, Matplotlib only uses BSD compatible code, and its license is based on the license: http://matplotlib.org/1.3.0/users/license.html
6. Adafruit_MCP4725 - © Adafruit Industries, BSD license: https://github.com/adafruit/Adafruit_MCP4725/blob/master/license.txt
7. https://github.com/adafruit/Adafruit_ADS1X15/blob/master/license.txt

I used an Adafruit 3.5" PiTFT display in my DOLPi prototype. This display has its own drivers and utility programs that are made available for free by Adafruit under the MIT and other licenses.

I prototype some of my software under MATLAB® which is a commercial package available for purchase from The Mathworks (http://www.mathworks.com/products/matlab/). The MATLAB® polarization imaging code shown in Appendix I of the DOLPi white paper at http://www.diyphysics.com/wp-content/uploads/2015/07/DOLPi_Polarimetric_Camera_D_Prutchi_2015.pdf is free for both academic and commercial use.