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The Open Source Initiative (OSI) is one such organization keeping a list of open-source licenses. [ 1] The Free Software Foundation (FSF) maintains a list of what it considers free. [ 2] FSF's free software and OSI's open-source licenses together are called FOSS licenses. There are licenses accepted by the OSI which are not free as per the Free ...
Software using such a license is free software (or free and open-source software) as conferred by the copyright holder. Free-software licenses are applied to software in source code and also binary object-code form, as the copyright law recognizes both forms.
Software license. Diagram of software under various licenses according to the FSF and their The Free Software Definition: on the left side "free software", on the right side "proprietary software". On both sides, and therefore mostly orthogonal, "free download" ( Freeware ). A software license is a legal instrument governing the use or ...
Product activation is a license validation procedure required by some proprietary software programs. Product activation prevents unlimited free use of copied or replicated software. Unactivated software refuses to fully function until it determines whether it is authorized to fully function. Activation allows the software to stop blocking its ...
Examples of license-free software formerly included programs written by Daniel J. Bernstein, such as qmail, djbdns, daemontools, and ucspi-tcp. Bernstein held the copyright and distributed these works without license until 2007. From December 28, 2007, onwards, he started placing his software in the public domain with an explicit waiver statement.
The GNU Lesser General Public License (LGPL) is a free-software license published by the Free Software Foundation (FSF). The license allows developers and companies to use and integrate a software component released under the LGPL into their own (even proprietary) software without being required by the terms of a strong copyleft license to release the source code of their own components.
The Apache Software Foundation and the Free Software Foundation agree that the Apache License 2.0 is a free software license, compatible with the GNU General Public License [5] (GPL) version 3, [2] meaning that code under GPLv3 and Apache License 2.0 can be combined, as long as the resulting software is licensed under the GPLv3. [6]
A permissive software license, sometimes also called BSD-like or BSD-style license, [ 1] is a free-software license which instead of copyleft protections, carries only minimal restrictions on how the software can be used, modified, and redistributed, usually including a warranty disclaimer. Examples include the GNU All-permissive License, MIT ...