Recommended copyleft licenses
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This page lists the copyleft licenses that we recommend free software projects and associated documentation use.
- The GNU General Public License, version 3 or any later version
- The GNU Affero General Public License, version 3 or any later version
- The GNU Free Documentation License, version 1.3 or any later version
To learn more about when and why we recommend these licenses, please see How to choose a license for your own work. Note that only the licenses listed above are recommended copyleft licenses; other licenses discussed in that guide are not copyleft licenses, or else suggested for use in more narrow circumstances.