Free Software Licensing Resources
Whether you're a new user who wants to learn more about the GNU GPL, or a developer curious about how a license affects you, we have a number of resources to help you find the information you're looking for.
The GNU Licenses
The following licenses are published by the Free Software Foundation:
- GNU General Public License (GPL)
- GNU Lesser General Public License (LGPL)
- GNU Affero General Public License (AGPL)
- GNU Free Documentation License (FDL)
Answers to Common Questions
If you have a particular question about a free software license, there's a good chance you'll find an answer on one of the pages below. These resources are primarily aimed at developers and users who are especially interested in licensing issues.
- The GPL Howto explains how you can release the software you write under a GNU license. If you're about to publish a new program, just follow this step-by-step guide.
- The GNU license FAQ lists many common questions about GNU licenses, and provides answers which are clear and concise.
- A Quick Guide to GPLv3 explains the new features of the latest version of the GPL, and how they benefit people developing and distributing GPLv3-covered software.
- Our list of licenses offers basic information about many common software licenses, such as whether or not it's a free software license, and if it's GPL-compatible. It also includes licenses for related materials such as documentation and general data.
- We've published instructions for reporting license violations. Please follow these steps if you think you've found a violation of any free software license.
Speeches and seminars
We occasionally give speeches about special topics, and conduct seminars to provide a comprehensive review of a particular license or issue. Check the FSF Events page to see what's on our calendar. If you'd like to arrange a talk for your organization, please contact us.
Answers by e-mail
If none of this information has answered your question, don't despair — just write us and we'll be happy to answer it. All you have to do is send an e-mail to email@example.com, and we'll be in touch.