Construction Zone is released under the GPLv3 License. For full information about the GPL licenses and for the full text, check out these resources. It is free to use, modify, or distribute, provided that any derivative works also provide the complete source code and freedom of use–we encouage any personal development of the software for your own use. We emphasize that Construction Zone is a research software under active development, and as such, we cannot provide any guarantees or warranties on the accuracy of any of our scientific implementations.