Copyleft is the legal technique of granting certain freedoms over copies of copyrighted works with the requirement that the same rights be preserved in...

licenses. The two main categories of open-source licenses are permissive and copyleft. Both grant permission to change and distribute software. Typically, they...

BSD-like or BSD-style license, is a free-software license which instead of copyleft protections, carries only minimal restrictions on how the software can...

licenses rely on a copyright holder's power to license their work, as copyleft which also utilizes copyright for such a purpose. The public domain is...

were of the "permissive" kind. In the mid-1980s, the GNU project produced copyleft free-software licenses for each of its software packages. An early such...

backed by financial penalties. Copyleft is a type of license that mandates derivative works to be licensed, Copyleft licenses exist for free and open...

proprietary) software without being required by the terms of a strong copyleft license to release the source code of their own components. However, any...

restrictions on reuse and therefore has high license compatibility. Unlike copyleft software licenses, the MIT License also permits reuse within proprietary...

rights reversed is a phrase that indicates a release of a publication under copyleft licensing status. It is a pun on the common copyright disclaimer "All rights...

generally find the same set of software to be acceptable, but sometimes see copyleft as restrictive. They generally advocate permissive free software licenses...

copylefted works differs fundamentally if a free and open copyleft license is used or if the copyleft license is de facto a commercial one, restricting certain...

proprietary. Some copyleft licenses block other means of turning software proprietary. Copyleft is a general concept. Copylefting an actual program requires...

software, even copyleft free software, can use dual-licensing to allow themselves or others to redistribute proprietary versions. Non-copyleft free software...

on the use and distribution of covered software. This is in contrast to copyleft licenses, which have share-alike requirements. The original BSD license...

complete operating system, designed as a clone of Unix and released under the copyleft GPL license. Thousands of Linux distributions exist, many based directly...

work to be released under the same or similar license as the original. Copyleft licenses are free content or free software licenses with a share-alike...

copyright notice and disclaimer. The Apache License is permissive; unlike copyleft licenses, it does not require a derivative work of the software, or modifications...

licenses, or copyleft licenses, that guarantee end users the freedoms to run, study, share, or modify the software. The GPL was the first copyleft license...

Pixabay, and Socratic. Creative Commons has been an early participant in the copyleft movement, which seeks to provide alternative solutions to copyright, and...

Design Science License (DSL) is a copyleft license for any type of free content such as text, images, music. Unlike other open source licenses, the DSL...

permissive copyleft) Creative Commons Attribution Copyleft & patentleft licenses GNU GPL, LGPL (weaker copyleft), AGPL (stronger copyleft) Creative Commons...

The GNU Affero General Public License (GNU AGPL) is a free, copyleft license published by the Free Software Foundation in November 2007, and based on the...

"weak" copyleft. "Weak" copyleft programs typically allow distributors to link them together with non-free programs, while "strong" copyleft strictly...

negotiate to combine code. Copyleft licenses are commonly deliberately incompatible with proprietary licenses, in order to prevent copyleft software from being...

remix culture, the hacker culture, the access to knowledge movement, the copyleft movement and the public domain movement. In the late 1960s, Stewart Brand...

A notebook interface or computational notebook is a virtual notebook environment used for literate programming, a method of writing computer programs....

and Cromemco. He made early use of the word copyleft, in Palo Alto Tiny BASIC's distribution notice "@COPYLEFT ALL WRONGS RESERVED" in June 1976. The Homebrew...

adopters license related improvements they develop under the same terms. Copyleft-style licensors seek "continuous growth of a universally accessible technology...

address some of the problems of the MPL. Like the MPL, the CDDL is a weak copyleft license in-between GPL license and BSD/MIT permissive licenses, requiring...

Internet portal Freedom of speech portal Comparison of BitTorrent sites Copyleft Criticism of copyright Home Taping Is Killing Music Internet freedom IPredator...