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Copyleft (a play on the word copyright) is the practice of using copyright law to offer the right to distribute copies and modified versions of a work and requiring that the same rights be preserved in modified versions of the work. In other words, copyleft is a general method for making a creative work as freely available to be modified, and requiring all modified and extended versions of the creative work to be free as well. -- Wikipedia

What is Copyleft? - GNU Project - Free Software Foundation

GNU Operating System Supported by the Free Software Foundation
https://www.gnu.org/licenses/copyleft.en.html - Details - Similar

Free content - Wikipedia

The 5Rs are put forward on the Open Content Project website as a framework for assessing the extent to which content is open:
https://en.wikipedia.org/wiki/Free_content - Details - Similar

Copyleft: Pragmatic Idealism - GNU Project - Free Software Foundation

In a world where technology is becoming increasingly predatory, free software is the solution. The FSF has been defending your software freedom for forty years. Join us in our crucial work to protect u
https://www.gnu.org/philosophy/pragmatic.html - Details - Similar

Give Up GitHub - Software Freedom Conservancy

The Software Freedom Conservancy provides a non-profit home and services to Free, Libre and Open Source Software (FLOSS) projects.
https://sfconservancy.org/give-up-github/ - Details - Similar

Open-source software - Wikipedia

This is an accepted version of this page
https://en.wikipedia.org/wiki/Open-source_software - Details - Similar

Choose the GPL instead of a no attribution license for your next pro

In a world where technology is becoming more and more predatory, a dystopian reality seems just around the corner. It can feel like others hold the reins and dictate how we live our lives. Fear not: free software
https://www.fsf.org/bulletin/2025/spring/choose-the-gpl-instead-of-a-no-attribution-license-for-your-next-program - Details - Similar

What is Free Software? - GNU Project - Free Software Foundation

Since 1983, developing the free Unix style operating system GNU, so that computer users can have the freedom to share and improve the software they use.
https://www.gnu.org/philosophy/free-sw - Details - Similar

What is Free Software? - GNU Project - Free Software Foundation

Since 1983, developing the free Unix style operating system GNU, so that computer users can have the freedom to share and improve the software they use.
http://www.gnu.org/philosophy/free-sw.html - Details - Similar

What is Free Software? - GNU Project - Free Software Foundation

Since 1983, developing the free Unix style operating system GNU, so that computer users can have the freedom to share and improve the software they use.
https://www.gnu.org/philosophy/free-sw.html - Details - Similar

Electrobel

Since 2003 Electrobel is the place to freely share your copyleft music
https://be.electrobel.org/ - Details - Similar

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