This is a comparison of published free software licenses and open-source licenses. The comparison only covers software licenses with a linked article for details, approved by at least one expert group at the FSF, the OSI, the Debian project, or the Fedora project. For a list of licenses not specifically intended for software, see List of free content licenses.
Video Comparison of free and open-source software licenses
FOSS licenses
FOSS stands for "Free and Open Source Software". There is no one universally agreed-upon definition of FOSS software and various groups maintain approved lists of licenses. The Open Source Initiative (OSI) is one such organization keeping a list of open-source licenses. The Free Software Foundation (FSF) maintains a list of what it considers free. 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 definition. The open source definition allows for further restrictions like price, type of contribution and origin of the contribution, e.g. the case of the NASA Open Source Agreement, which requires the code to be "original" work. The OSI does not endorse FSF license analysis (interpretation) as per their disclaimer.
The FSF's Free Software definition focuses on the user's unrestricted rights to use a program, to study and modify it, to copy it, and redistribute it for any purpose, which are considered by the FSF the four essential freedoms. The OSI's open-source criteria focuses on the availability of the source code and the advantages of an unrestricted and community driven development model. Yet, many FOSS licenses, like the Apache license, and all Free Software licenses allow commercial use of FOSS components.
Maps Comparison of free and open-source software licenses
General comparison
The following table compares various features of each license and is a general guide to the terms and conditions of each license. The table lists the permissions and limitations regarding the following subjects:
- Linking - linking of the licensed code with code licensed under a different license (e.g. when the code is provided as a library)
- Distribution - distribution of the code to third parties
- Modification - modification of the code by a licensee
- Patent grant - protection of licensees from patent claims made by code contributors regarding their contribution, and protection of contributors from patent claims made by licensees
- Private use - whether modification to the code must be shared with the community or may be used privately (e.g. internal use by a corporation)
- Sublicensing - whether modified code may be licensed under a different license (for example a copyright) or must retain the same license under which it was provided
- Trademark grant - use of trademarks associated with the licensed code or its contributors by a licensee
Approvals
This table lists for each license what organizations from the FOSS community have approved it - be it as a "free software" or as an "open source" license - , how those organizations categorize it, and the license compatibility between them for a combined or mixed derivative work. Organizations usually approve specific versions of software licenses. For instance, a FSF approval means that the Free Software Foundation (FSF) considers a license to be free software license. The FSF recommends at least "Compatible with GPL" and preferably copyleft. The OSI recommends a mix of permissive and copyleft licenses, the Apache License 2.0, 2- & 3-clause BSD license, GPL, LGPL, MIT license, MPL 2.0, CDDL and EPL.
See also
- Free software
- Free software license
- List of free content licenses
- Open-source software
References
Source of article : Wikipedia
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