https://choosealicense.com/licenses/
Licenses
Open source licenses grant permission for anybody to use, modify, and share licensed software for any purpose, subject to conditions preserving the provenance and openness of the software. The following licenses are sorted by the number of conditions, from most (GNU AGPLv3) to none (Unlicense). Notice that the popular licenses featured on the home page (GNU GPLv3 and MIT) fall within this spectrum.
If you’re looking for a reference table of every license on choosealicense.com, see the appendix.
GNU AGPLv3
Permissions of this strongest copyleft license are conditioned on making available complete source code of licensed works and modifications, which include larger works using a licensed work, under the same license. Copyright and license notices must be preserved. Contributors provide an express grant of patent rights. When a modified version is used to provide a service over a network, the complete source code of the modified version must be made available.
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GNU GPLv3
Permissions of this strong copyleft license are conditioned on making available complete source code of licensed works and modifications, which include larger works using a licensed work, under the same license. Copyright and license notices must be preserved. Contributors provide an express grant of patent rights.
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GNU LGPLv3
Permissions of this copyleft license are conditioned on making available complete source code of licensed works and modifications under the same license or the GNU GPLv3. Copyright and license notices must be preserved. Contributors provide an express grant of patent rights. However, a larger work using the licensed work through interfaces provided by the licensed work may be distributed under different terms and without source code for the larger work.
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Mozilla Public License 2.0
Permissions of this weak copyleft license are conditioned on making available source code of licensed files and modifications of those files under the same license (or in certain cases, one of the GNU licenses). Copyright and license notices must be preserved. Contributors provide an express grant of patent rights. However, a larger work using the licensed work may be distributed under different terms and without source code for files added in the larger work.
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Apache License 2.0
A permissive license whose main conditions require preservation of copyright and license notices. Contributors provide an express grant of patent rights. Licensed works, modifications, and larger works may be distributed under different terms and without source code.
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MIT License
A short and simple permissive license with conditions only requiring preservation of copyright and license notices. Licensed works, modifications, and larger works may be distributed under different terms and without source code.
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Boost Software License 1.0
A simple permissive license only requiring preservation of copyright and license notices for source (and not binary) distribution. Licensed works, modifications, and larger works may be distributed under different terms and without source code.
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The Unlicense
A license with no conditions whatsoever which dedicates works to the public domain. Unlicensed works, modifications, and larger works may be distributed under different terms and without source code.
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The above licenses represent the entire spectrum of open source licenses, from highly protective to unconditional. One of these should work for most new open source projects. Many other open source licenses exist, including older versions of and close substitutes for some of the above. See the resources listed on our about page if you’d like to read more.
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