Affero General Public License v1.0The earlier network-focused Affero copyleft that inspired the GNU AGPL line.CeCILL 2.1French free software copyleft license aligned with European law and intended to remain GPL-compatible.Creative Commons Attribution-ShareAlike 3.0The previous ShareAlike generation, still carried by an enormous body of existing works — including years of Wikipedia history.Creative Commons Attribution-ShareAlike 4.0Copyleft for cultural works: adaptations must be shared under the same terms. The license of Wikipedia and much of the free culture movement.GNU Affero General Public License v3.0Copyleft that also covers software used over a network — users of a service must be able to get its source.GNU Affero General Public License v3.0 onlyGNU AGPLv3 without the “or later” clause, extending source-sharing obligations to network users of the software.GNU Free Documentation License v1.3Copyleft for manuals and documentation, designed so free software ships with free documentation. Wikipedia's original license.GNU General Public License v1.0The original GNU copyleft license that established the basic reciprocity model later refined by GPLv2 and GPLv3.GNU General Public License v2.0The license of the Linux kernel and decades of free software history. A foundational copyleft text.GNU General Public License v2.0 onlyGPLv2 without the automatic “or later” clause. Important for kernel-space and projects that pin precisely to v2.GNU General Public License v3.0The strongest widely-used copyleft license. Derivative works must remain free under the same terms.GNU General Public License v3.0 onlyGPLv3 without the “or later” upgrade clause, preserving the stronger anti-tivoization and patent terms of version 3 only.Open Software License 3.0A strong copyleft license with explicit patent language and conditions oriented toward modern software distribution.SIL Open Font License 1.1The standard free license for fonts: fonts may be used, modified and redistributed, but must stay under the OFL.