WTFPL


WTFPL is a GPL-compatible permissive license most commonly used as a free software license. As a public domain like license, the WTFPL is essentially the same as dedication to the public domain. It allows redistribution and modification of the work under any terms. The title is an abbreviation of "Do What The Fuck You Want To Public License".
The first version of the WTFPL, released in March 2000, was written by Banlu Kemiyatorn for his own software project. Sam Hocevar, Debian's former project leader, wrote version 2.

Characteristics

The WTFPL intends to be a permissive, public-domain-like license. The license is not a copyleft license. The license differs from public domain in that an author can use it even if they do not necessarily have the ability to place their work in the public domain according to their local laws.
The WTFPL does not include a no-warranty disclaimer, unlike other permissive licenses, such as the MIT License. Though the WTFPL is untested in court, the official website offers a disclaimer to be used in software source code.

Terms

Version 2

The text of Version 2, the most current version of the license, written by Sam Hocevar:

DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE
Version 2, December 2004
Copyright 2004 Sam Hocevar
Everyone is permitted to copy and distribute verbatim or modified
copies of this license document, and changing it is allowed as long
as the name is changed.
DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE
TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
0. You just DO WHAT THE FUCK YOU WANT TO.

Version 1


do What The Fuck you want to Public License
Version 1.0, March 2000
Copyright 2000 Banlu Kemiyatorn.
136 Nives 7 Jangwattana 14 Laksi Bangkok
Everyone is permitted to copy and distribute verbatim copies
of this license document, but changing it is not allowed.
Ok, the purpose of this license is simple
and you just
DO WHAT THE FUCK YOU WANT TO.

Application

To apply the WTFPL to a creative work the author of the work should add a copy of the terms of the license version they wish to use alongside or near the work with which the license is applied. The name of the author named in the license should not be changed unless the name of the license is changed as well—in which case a new version is thereby created.

Reception

Usage

The WTFPL is not in wide use among open-source software projects; according to Black Duck Software, the WTFPL is used by less than one percent of open-source projects.
Examples include the OpenStreetMap Potlatch online editor, the video game Liero and MediaWiki extensions. Almost 3,000 Wikimedia Commons files were published under the terms of the WTFPL.

Discussion

The license was confirmed as a GPL-compatible free software license by the Free Software Foundation, but its use is "not recommended". In 2009, the Open Source Initiative chose not to approve the license as an open-source license, saying:
The WTFPL version 2 is an accepted Copyfree license. It is also accepted by Fedora as a free license and GPL-compatible.
Some software authors have said that the license is not very serious; forks have tried to address wording ambiguity and liability concerns. OSI founding president Eric S. Raymond interpreted the license as written satire against the restrictions of the GPL and other software licenses; WTFPL version 2 author Sam Hocevar later confirmed that the WTFPL is a parody of the GPL. Free-culture activist Nina Paley said she considered the WTFPL a free license for cultural works.