The content of the Glass Half project is released under the Creative Commons Attribution 3.0 license. This includes all the data we publish on this website. If any content on this site is not licensed as such, it will be clearly indicated.
In short, this means you can freely reuse and distribute this content, also commercially, as long you include proper attribution.
The attribution is (if not specifically mentioned otherwise):
(CC) Blender Foundation | cloud.blender.org
Excluded from the Creative Commons license is: all logos on this website (including the Blender logo, Glass Half logo, Creative Commons logo, sponsor logos) and associated trademarks. Also excluded is material that’s clearly not produced by the Glass Half project, such as magazine covers.
For questions about licensing rights for Glass Half content you can email: foundation at blender.org.