[sebisebi]

Thank you for the list. Someone also mentioned codementor.io in the other thread. If you don't include a license, it is protected by copyright fyi.

[RonanTheGrey]

I'll add it! Funny I forgot, I have an account there ^_^

[pluma]

This is bikeshedding, but I think CC0 is more appropriate than the Unlicense. CC0 covers all copyrighted works, Unlicense was specifically written for software. As this is a text file, the Unlicense doesn't really apply.

https://creativecommons.org/publicdomain/zero/1.0/