Published by the Freedom of Development Project.
This "US variant" contains a Choice of Law section. If you are not in the US and are not based in the US, you should choose the international version of the Free Development Public License.
This license gives everyone as much permission to work with this software as possible, while protecting contributors from liability and protecting the freedom of end users.
In this license, "software" also refers to any documentation or other resources provided with the software.
In order to receive this license, you must agree to its rules. The rules of this license are both obligations under that agreement and conditions to your license. You must not do anything with this software that triggers a rule that you cannot or will not follow. If you do not agree, then you cannot use this software in any way.
Each contributor licenses you to do everything with this software that would otherwise infringe that contributor's copyright in it.
Neither this software nor any work that is combined with this software will be considered a technological protection measure under the WIPO Copyright Treaty, DMCA, or any similar law. Reverse engineering of this software and of any work that is combined with this software is always allowed.
You must ensure that everyone who gets a copy of any part of this software from you, with or without changes, also gets the text of this license.
If anyone notifies you in writing that you have not complied with Notices, you can keep your license by taking all practical steps to comply within 30 days after the notice. If you do not do so, your license ends immediately.
Each contributor licenses you to do everything with this software that would otherwise infringe any patent claims they can license or become able to license. In return, you license each contributor and anyone else who has accepted this license to do everything with this software that would otherwise infringe any patent claims you can license or become able to license.
No contributor can revoke this license.
You can also use this software under the terms of the GNU GPL 3.0, GNU AGPL 3.0, or any later version of those licenses. If you do, No Harm and No Liability still apply.
The Freedom of Development Project may publish revised or new versions of the Free Development Public License. Those new versions will be similar in spirit to this license, and they will never impose new obligations on any contributors.
Unless a contributor specifies otherwise, you have the option of following the terms of any later version of this license. Your choice to follow a later version of the license will not impose additional obligations on any contributor. Even if you do, Choice of Law still applies.
The rules of this license will be governed by the law of the United States of America, without regard to conflict of law principles. The English version of this license is the original version, and only the English version of this license will be executed.
The provisions of Choice of Law, No Harm, and No Liability survive the end of your license.
You agree that no contributor's conduct in the creation of this software has caused you any harm. As far as the law allows, you give up your right to pursue any kind of legal claim against any contributor for actions related the creation of this software, even if those actions broke a previous agreement.
As far as the law allows, this software comes as is, without any warranty or condition, and no contributor will be liable to anyone for any damages related to this software or this license, under any kind of legal claim.