This week's book giveaways are in the Cloud and AI/ML forums. We're giving away four copies each of Cloud Native Patterns and Natural Language Processing and have the authors on-line! See this thread and this one for details.
The application expires every two weeks and you will need to download it again.
I'm not sure about the license, the source code isn't available AFAIK. It is free now but I guess it is going to be a commercial product in the future.