Open source licenses by category open source initiative. Opensource licensed software is mostly available free of charge, though this does not necessarily have to be the case. In the lists below, a parenthesized expression following a license name is its spdx short. Comparison of free and opensource software licenses wikipedia.
Spdx license list software package data exchange spdx. Cnri python open source gpl compatible license agreement, cnripythongplcompatible, license text. What is free software and is it the same as open source. However, while doing so, youre required to follow the terms of the apache license. The list of commonly found exceptions to free and open source licenses, which can be. Open source licenses are licenses that comply with the open source definition in brief, they allow software to be freely used, modified, and shared. The free software foundation recognizes the wtfpl as a gplcompatible free software license but does not recommend its use. To be approved by the open source initiative also known as the osi, a license must go. This license agreement is between the python software foundation psf, and the individual or organization licensee accessing and otherwise using this software python in source or binary form and its associated documentation. Foss components are those covered by an osiapproved license other.
There are licenses accepted by the osi which are not free as per the free. Openbsd, free software foundation, larry ewing, seattle municipal archives. Subject to the terms and conditions of this license, each contributor hereby grants to you a perpetual, worldwide, nonexclusive, nocharge, royaltyfree, irrevocable except as stated in this section patent license to make, have made, use, offer to sell, sell, import, and otherwise transfer the work, where such license applies only to those patent claims licensable by such contributor that are necessarily infringed by their contributions alone or by combination of their contributions. Gpl version 2, with one additional section that affero added with fsf approval. The open source definition allows for further restrictions like price, type of contribution and origin of the contribution, e. The aim and utility of copyleft is to protect the free software world against. There are licenses accepted by the osi which are not free as per the free software definition. Various licenses and comments about them gnu project free. The open source initiative osi has certified two of microsoft corp. Osi agrees with fsf on all widely used freesoftware licenses, but differ from fsfs list, as it approves against the open source definition rather than the free software definition. Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files the software, to deal in the software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, andor sell copies of the software, and to permit persons to whom the software is furnished to do so, subject to the following conditions. The group open source initiative osi defines and maintains a list of approved opensource licenses. Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files the software, to deal in the software without restriction, including. Cecillc free software license agreement cecillc dfsg approved.
This is a lax, permissive free software license, compatible with the gnu gpl. Of the tens of open source licenses in the osi approved list, some reign. Failure to choose an osiapproved license can also invalidate a project. Comparison of free and opensource software licenses. The python package index pypi is a repository of software for the python programming language. Certain licensors, such as schools and the us government, have specialized concerns, such as specialized rules for government s. Other wellknown examples of widely used free software licences approved by the. Of course, youll also need to follow the conditions in this license agreement for. An opensource license is a type of license for computer software and other products that. An opensource license is a type of license for computer software and other products that allows the source code, blueprint or design to be used, modified andor shared under defined terms. Cmake is distributed under the osi approved bsd 3clause license. The microsoft public license is a free and open source software. One popular set of opensource software licenses are those approved by the open source initiative osi. Matrix of eupl compatible open source licences joinup.
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