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Free software licenses:

Artistic License
The Artistic License is a software license used for certain free software packages, most notably the standard Perl implementation and most CPAN modules, which are dual-licensed under the Artistic License and the GNU General Public License (GPL). It was written by Larry Wall.

Sleepycat License
The Sleepycat Public License is an OSI-approved open-source license used by Sleepycat Software for their products Berkeley DB, Berkeley DB Java Edition and Berkeley DB XML.

BSD license
BSD licenses represent a family of permissive free software licences. The original was used for the Berkeley Software Distribution, a Unix-like operating system for which the license is named.

Cryptix General License
The Cryptix General License is in use by the Cryptix project, well known for their Java Cryptography Extension. It is a modified version of the BSD license, with similarly liberal terms.

GNU General Public License
The GNU General Public License (GNU GPL or simply GPL) is a widely used free software license, originally written by Richard Stallman for the GNU project. It is the license used by the Linux kernel. The GPL is the most popular and well-known example of the type of strong copyleft license that requires derived works to be available under the same copyleft.

License of Python
The Python Software Foundation License (PSFL) is a permissive free software license which is compatible with the GNU General Public License (GPL). Its primary use is for distribution of the Python project software. Unlike the GPL the Python license is not a copyleft licence, and allows modifications to the source code, as well as the construction of derivative works, without making the code open-source.

MIT license
The MIT License is a free software license originating at the Massachusetts Institute of Technology (MIT). It is a permissive license, meaning that it permits reuse within proprietary software on the condition that the license is distributed with that software, and GPL-compatible, meaning that the GPL permits combination and redistribution with software that uses the MIT License.

Public Domain
The public domain is a range of abstract materials - commonly referred to as intellectual property - which are not owned or controlled by anyone.

W3C Software License
W3C Software Notice and License is a permissive free software licence used by software released by W3C, like Amaya.

WTFPL
The WTFPL (Do What The Fuck You Want To Public License) is an extremely liberal, uncommon open source/free software license. It allows for redistribution and modification of the software under any termsthe licensee is encouraged to "do what the fuck [they] want to".

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Software distribution:

Freeware
Freeware is copyrighted computer software which is made available for use free of charge, for an unlimited time. Authors of freeware often want to "give something to the community", but also want to retain control of any future development of the software.

Shareware
Shareware is a marketing method for computer software. Shareware software is software that can be obtained by a user, often by downloading from the Internet or on magazine cover-disks free of charge to try out a program before you buy the full version of that program.

Demoware
Demoware (also known as trialware) is commercial software released for free (shareware) in a version which is limited in one or more ways. Some of the most common limitations are:Software remains functional only for a limited time, Adds identifying marks or signatures to output files, Restricts or blocks access to an important function.

Nagware
Nagware (also known as begware or annoyware) is a type of shareware that reminds (or nags) the user to register it by paying a fee.

Donationware
Donationware is a licensing model that supplies fully operational software to the user and requests a donation be paid to the programmer or a third-party beneficiary

Careware
Careware (or charityware, helpware, goodware) is software distributed in a way that benefits a charity. The term "careware" is a variant on shareware and freeware.

Abandonware
Abandonware refers to computer software that is no longer claimed, owned, or copyrighted. While the term has been applied largely to older games, other classes of software are sometimes described as such.

Beerware
Beerware is a somewhat tongue-in-cheek term for software released under a very relaxed license. It provides the end user with the right to use a particular program (or do anything else with the source code) if they buy the author a beer, or, in some variations, drink a beer in the author's honor.

Foistware
Foistware is software bundled with completely unrelated programs. That means that there is no particular property in the software that makes it foistware, but rather the context in which it was installed.

Requestware
Otherware, sometimes called requestware, is a collective term referring to software that is not distributed as freeware, shareware or commercial software. Usually, otherware requests the user to do something other than paying to the software author; therefore, it may be considered a type of freeware.

Registerware
Registerware refers to computer software which requires the user to give personal information through registration in order to download or use the program.

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