Tech5 face recognition SDK uses following libraries under there license agreements:

• OpenSSL https://www.openssl.org/docs/faq.html#LEGAL
• OpenCV https://opencv.org/license/
• Google Test https://github.com/google/googletest/blob/master/LICENSE
• Yaml https://github.com/jbeder/yaml-cpp/blob/master/LICENSE
• OpenMP https://github.com/llvm-mirror/openmp/blob/master/LICENSE.txt