In 1989, we published the GNU #GPL. It is at the core of software freedom and it protects users' rights to run, copy, modify, and share. Read more about free software licensing https://www.fsf.org/licensing
@dff downloaded Thanks for the recommendation!
@worldsendless I've seen some creative works that aren't software given GPL style licenses. However, licenses such as the #CreativeCommons ones tend to be more widely used for a variety of reasons. Was very impressed with Lawrence Lessig's book which talks about the Creative Commons and mentions Free Software as an inspiration: https://www.feedbooks.com/book/2750