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LICENSING – Kinds of FSL with GPL-Compatible

August 7, 2009
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The Free Software License (FSL) divided into two distinct categories, GPL Compatible and GPL Incompatible.
GPL – COMPATIBLE
The General Public License (GPL) is a popular license, many of the most common free software licenses, such as the original MIT/X license, the BSD license, and LGPL, are ¬タワGPL-Compatible¬タ?. That is, their code can be combined with a program under the GPL without conflict.
However, some free/open source software licenses are not GPL-compatible. Many have strongly supported that free/open source software developers use only GPL-compatible licenses, because doing otherwise makes it difficult to reuse software in larger wholes.
The some of GPL-Compatible Licenses are,
Intel Open Source License
Berkeley Database License
Artistic License
License of Python
MIT License
License of Perl
Public Domain
Zope Public License
BSD License (modified version)
Cryptix General License
X11 Licenses
ISC License
W3C Software notice and license
LGPL / GNU Lesser General Public License
The following Licenses qualify as Free Software Licenses, and are Compatible with the GPL.
Intel Open Source License
This is a Free Software License, compatible with GNU GPL.
Berkeley Database License (Sleepycat Software Product License)
The Sleepycat Public License is as OSI approved open source license used by Sleepycat Software for their products Berkeley DB, Berkeley DB Java Edition and Berkeley DB XML. According to the Free Software Foundation, it qualifies as a Free Software License, and is compatible with the GNU General Public License (v1, v2).
Artistic License 2.0
The Artistic License is a software license used for certain free software packages, most notably the standard Perl implementation and most CPAN (Comprehensive Perl Archive Network) modules, which are dual-licensed under the Artistic license and the GNU GPL. It was written by Larry Wall.
License of Python
The Python Software Foundation License (PSFL) is a Free Software License which is compatible with the GNU GPL. Its primary use is for distribution of the Python project software. It allows modifications to the source code, as well as the construction of derivative works, without making the code open-source.
Early versions of this license were incompatible with the GPL. The reason given by FSF was that ¬タワthis Python license is governed by the laws of the ¬タリState of Virginia¬タル, in the USA, and the GPL does not permit this.¬タ?
MIT License
The MIT License is a Free Software License origination 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.
According to the FSF, the MIT License is more accurately called the X11 License.
License of Perl 5 and Below
This license is the disjunction of the Artistic License 1.0 and the GNU GPL in other words; you can choose either of those two licenses. It qualifies as a free software license, but it may not be a real copyleft. It is compatible with the GNU GPL because the GNU GPL is one of the alternatives.
Public Domain
Being in the public domain is not a license; rather, it means the material is not copyrighted and no license is needed. Practically speaking, though, if a work is in the public domain, it might as well have an all-permissive non-copyleft free software license.
Public domain material is compatible with the GNU GPL.
Zope Public License
Zope Public License is a Free Software License, used primarily for the Zope application server software. The license is similar to the well-known BSD license, and compatible with GNU GPL.
BSD License
The BSD Licenses represent a family of permissive free software license. The original owners of BSD were the Regents of the University of California because BSD was first written at the University of California, Berkeley.
This is the original BSD License, sometimes called the ¬タワ2-clause BSD license¬タ?. It is a simple, permissive non-copyleft free software license, compatible with GNU GPL.
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.
X11 Licenses
According to the FSF, the MIT License is more accurately called the X11 License. Since MIT has used many licenses for software.
This is a simple, permissive non-copyleft Free Software License, compatible with the GNU GPL. Older versions of XFree86 used the same license, and some of the current variants of XFree86 also do. Later versions of XFree86 are distributed under the Xfree86 1.1 License.
ISC License
The ISC License is a permissive free software license written by the Internet Systems Consortium (ISC). It is functionally equivalent to the 2-clause BSD license.
W3C Software Notice and License
W3C Software Notice and License is a permissive free software license used by software released by W3C (World Wide Web Consortium).
It is similar to the modified BSD License. According to the Free Software Foundation, it is compatible with the GNU GPL.
LGPL / GNU Lesser General Public License
The GNU Lesser General Public License or LGPL is a Free Software License published by the FSF. It was designed as a compromise between the strong-copyleft GNU GPL and permissive licenses such as the BSD licenses and the MIT License.
The LGPL was written in 1991 (and updated in 1999) by Richard Stallman, with legal advice from Eben Moglen.
The LGPL is primarily used for software libraries, although it is also used by some standalone applications, most notably Mozilla.
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