License.txt

These tools are released to you for free under a Creative Commons Attribution-NonCommercial-ShareAlike license. Full details can be found at https://creativecommons.org/licenses/by-nc-sa/4.0/. You are free to share and modify the content any way you desire, as long as you respect the following conditions. 

Attribution: You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use. (The lawyers demand this one)

NonCommercial: You may not use the material for commercial purposes. (Don’t sell these or offer them as part of a commercial product)

ShareAlike: If you remix, transform, or build upon the material, you must distribute your contributions under the same license as the original. (This keeps the work free)

The software is provided “as is”, without warranty of any kind, express or implied, including but not limited to the warranties of merchantability, fitness for a particular purpose and noninfringement. In no event shall the authors or copyright holders be liable for any claim, damages or other liability, whether in an action of contract, tort or otherwise, arising from, out of or in connection with the software or the use or other dealings in the software.