Any project about any topic under licenses which permit the use, copy, modification and distribution of the knowledge or information generated in this project. That is, these kind of projects release free/libre knowledge. Then you give these freedoms:
The freedom to use the knowledge generated in the project, for any purpose.
The freedom to study how the project works, and adapt it to your needs. Access to the project documentation and any other information produced is a precondition (...)
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