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Open Source Licenses
The licenses listed here meet the requirements of the Free Software Definition and Open Source Definition. They are divided into the following categories according to their licensing characteristics:
- Licenses without Copyleft
- Licenses with Strong Copyleft
- Licenses with Weak Copyleft
- Licenses with Choice Options
- Licenses with Privileges
Software under such licenses may be referred to as Free or Open Source Software. For some of the listed licenses it is controversial or unclear whether these requirements are fulfilled, since the relevant definitions, the free software definition and the open source definition are not identical and license texts are not always clearly written. These licenses are marked with βunclear classificationβ.
Licenses without Copyleft aka Permissive Licenses
Licenses without copyleft are characterized by the fact that they grant the licensee all freedoms of an open source license and do not contain any conditions regarding the type of license to be used for modifications of the software. This allows the licensee to redistribute modified versions of the software under any license conditions, i.e. also convert them into proprietary software.
| Lizenz | Text | SPDX-tag |
|---|---|---|
| 4Suite License (v. 1.1) | π¬π§ | - |
| Academic Free License (AFL) (v. 1.0) | π¬π§ | - |
| Academic Free License (AFL) (v. 1.1) | π¬π§ | - |
| Academic Free License (AFL) (v. 1.2) | π¬π§ | - |
| Academic Free License (AFL) (v. 2.0) | π¬π§ | - |
| Academic Free License (AFL) (v. 2.1) | π¬π§ | - |
| Academic Free License (AFL) (v. 3.0) | π¬π§ | - |
| Apache License (v. 1.0) | π¬π§ | - |
| Apache License (v. 1.1) | π¬π§ | - |
| Apache License (v. 2.0) | π¬π§ | - |
| Beerware License | π¬π§ | - |
| Boost Software License (Einordnung unklar) | π¬π§ | - |
| BSD 2-clause βSimplifiedβ or βFreeBSDβ License | π¬π§ | - |
| BSD 3-clause βNewβ or βRevisedβ License | π¬π§ | - |
| BSD 4-clause βOriginalβ or βOldβ License | π¬π§ | - |
| CeCILL-B Free Software License Agreement | π¬π§ | - |
| Christian Software Public License | π¬π§ | - |
| CNRI Open Source License Agreement | π¬π§ | - |
| Condor Public License (v. 1.1) | π¬π§ | - |
| Contrat de License de Logiciel Libre CeCILL-B | π¬π§ | - |
| Cougaar Open Source License | π¬π§ | - |
| Cryptix General License | π¬π§ | - |
| Curl License | π¬π§ | - |
| Do What The Fuck You Want To Public License (v. 1.0) | π¬π§ | - |
| Do What The Fuck You Want To Public License (v. 2.0) | π¬π§ | - |
| Eclipse Distribution License (v 1.0) | π¬π§ | - |
| Educational Community License (v. 1.0) | π¬π§ | - |
| Educational Community License (v. 2.0) | π¬π§ | - |
| Eiffel Forum License (v. 1.0) | π¬π§ | - |
| Eiffel Forum License (v. 2.0) | π¬π§ | - |
| Entessa Public License (v. 1.0) | π¬π§ | - |
| EU DataGrid Software License (v. 2.0) | π¬π§ | - |
| Fair License | π¬π§ | - |
| Free Fuzzy Logic Library Open Source License | π¬π§ | - |
| FreeType Project License | π¬π§ | - |
| FSF Unlimited License | π¬π§ | - |
| Galen Open Source License (GOSL) | π¬π§ | - |
| GD License | π¬π§ | - |
| Globus Toolkit Public License | π¬π§ | - |
| Globus Toolkit Public License (GTPL) (v. 2.0) | π¬π§ | - |
| ICU License | π¬π§ | - |
| ImageMagick Terms and Conditions for Use, Reproduction, and Distribution | π¬π§ | - |
| Independent JPEG Group License | π¬π§ | - |
| ISC License | π¬π§ | - |
| JDOM License | π¬π§ | - |
| Historical Permission Notice and Disclaimer (HPND) | π¬π§ | - |
| Horde Apache-like License | π¬π§ | - |
| Horde BSD-like License | π¬π§ | - |
| Indiana University Extreme! Lab Software License, Version 1.2 | π¬π§ | - |
| Intel Open Source License for CDSA/CSSM Implementation | π¬π§ | - |
| ISC License | π¬π§ | - |
| JasPer License Version 2.0 | π¬π§ | - |
| JSON License | π¬π§ | - |
| Libpng License | π¬π§ | - |
| Lua Copyright notice | π¬π§ | - |
| Lucent Public License Version (v. 1) | π¬π§ | - |
| Lucent Public License Version (v. 1.02) | π¬π§ | - |
| Microsoft Permissive License (Ms-PL) (Einordnung unklar) | π¬π§ | - |
| Microsoft Public License (Ms-PL) (Einordnung unklar) | π¬π§ | - |
| MirOS License | π¬π§ | - |
| MIT License | π¬π§ | - |
| Mozart License | π¬π§ | - |
| Mulan Permissive Software LicenseοΌVersion 1 (Mulan PSL v1) | π¬π§ | - |
| Mulan Permissive Software LicenseοΌVersion 2 (Mulan PSL v2) | π¬π§ | - |
| Naumen Public License | π¬π§ | - |
| NTP License | π¬π§ | - |
| NUnit License | π¬π§ | - |
| OGC Software License, Version 1.0 | π¬π§ | - |
| Open Group Test Suite License | π¬π§ | - |
| Open Media Group Open Source License | π¬π§ | - |
| OpenLDAP Public License (v. 1.1) | π¬π§ | - |
| OpenLDAP Public License (v. 1.2) | π¬π§ | - |
| OpenLDAP Public License (v. 1.3) | π¬π§ | - |
| OpenLDAP Public License (v. 1.4) | π¬π§ | - |
| OpenLDAP Public License (v. 2.0) | π¬π§ | - |
| OpenLDAP Public License (v. 2.0.1) | π¬π§ | - |
| OpenLDAP Public License (v. 2.1) | π¬π§ | - |
| OpenLDAP Public License (v. 2.2) | π¬π§ | - |
| OpenLDAP Public License (v. 2.3) | π¬π§ | - |
| OpenLDAP Public License (v. 2.4) | π¬π§ | - |
| OpenLDAP Public License (v. 2.5) | π¬π§ | - |
| OpenLDAP Public License (v. 2.6) | π¬π§ | - |
| OpenLDAP Public License (v. 2.7) | π¬π§ | - |
| OpenLDAP Public License (v. 2.8) | π¬π§ | - |
| OpenSSL License (Einordnung unklar) | π¬π§ | - |
| Pangeia Informatica Copyright (v. 1.2) | π¬π§ | - |
| Phorum License (v. 2.0) | π¬π§ | - |
| PHP License (v. 3.0) | π¬π§ | - |
| PHP License (v. 3.1) | π¬π§ | - |
| PostgreSQL License | π¬π§ | - |
| Privaria Attribution Assurance License | π¬π§ | - |
| Python 2.0.1 License | π¬π§ | - |
| Python 2.4.2 license | π¬π§ | - |
| Python Software Foundation License (v. 2) | π¬π§ | - |
| Ruby License | π¬π§ | - |
| Sendmail License | π¬π§ | - |
| skyBuilders Open Source License | π¬π§ | - |
| SpeechWorks Public License - Software (v. 1.1) | π¬π§ | - |
| Standard ML of New Jersey Copyright Notice | π¬π§ | - |
| Suneido Free Software License | π¬π§ | - |
| Tcl/Tk License Terms | π¬π§ | - |
| Tea Software License | π¬π§ | - |
| The βNo problem Bugroffβ license | π¬π§ | - |
| The SpeechWorks Public License (v. 1.1 ) | π¬π§ | - |
| Trusster Open Source License (v. 1.0a) | π¬π§ | - |
| Udanax Open-Source License | π¬π§ | - |
| Universal Permissive License (v. 1.0) | π¬π§ | - |
| University of Illinois/NCSA Open Source License (NSCA) | π¬π§ | - |
| Unlicense | π¬π§ | - |
| vbAccelerator Software License (v. 1.0) | π¬π§ | - |
| Vovida Software License v 1.0 | π¬π§ | - |
| W3C Software and Document Notice and License | π¬π§ | - |
| Wide Open License (WOL) | π¬π§ | - |
| X11 License | π¬π§ | - |
| X Window System License | π¬π§ | - |
| X.Net License | π¬π§ | - |
| XFree86 Licence | π¬π§ | - |
| xinetd License | π¬π§ | - |
| Zlib license | π¬π§ | - |
| Zope Public License (v. 1.1) | π¬π§ | - |
| Zope Public License (v. 2.0) | π¬π§ | - |
| Zope Public License (v. 2.1) | π¬π§ | - |
Licenses with Strong Copyleft
In the case of licenses with a strict copyleft effect, the licensee is obliged to distribute works derived from the original software only under the conditions of the original license. However, the licenses listed here are not necessarily βGPL-compatibleβ.
GPL-style Licenses
The licenses listed here contain the different GPL versions and derived license texts. There are also some GPL variants with exceptions from the strong copyleft. These licenses with exceptions are then to be understood as weak copyleft, but are listed here for the sake of a better orientation.
| Lizenz | Text | SPDX-tag |
|---|---|---|
| Affero General Public License (v. 1) | π¬π§ | - |
| Affero General Public License (v. 2) | π¬π§ | - |
| Alternate Route Open Source License (v. 1.1) | π¬π§ | - |
| CrossPoint Quelltextlizenz | π¬π§ | - |
| eCos License (v. 2.0) | π¬π§ | - |
| FreeCard License | π¬π§ | - |
| GNU Affero General Public License (AGPL-3.0) (v. 3.0) | π¬π§ | - |
| GNU Emacs General Public License | π¬π§ | - |
| GNU General Public License (GPL) (v. 1.0) | π¬π§ | - |
| GNU General Public License (GPL) (v. 2.0) | π¬π§ | - |
| GNU General Public License (GPL) (v. 3.0) | π¬π§ π©πͺ | GPL-3.0-or-later |
| Honest Public License (HPL) (v 1.0) | π¬π§ | - |
| Honest Public License (HPL) (v 1.1) | π¬π§ | - |
| Nethack General Public License | π¬π§ | - |
| Open RTLinux Patent License | π¬π§ | - |
| RedHat eCos Public License (v. 2.0) | π¬π§ | - |
| Simple Public License (v. 2.0) | π¬π§ | - |
Other Licenses with Strong Copyleft
| Lizenz | Text | SPDX-tag |
|---|---|---|
| Arphic Public License | π¬π§ | - |
| Contrat de License de Logiciel Libre CeCILL (v. 1.0) | π«π· π¬π§ | - |
| CeCILL Free Software License Agreement (v. 1.1) | π¬π§ | - |
| Contrat de License de Logiciel Libre CeCILL (v. 2.0) | π«π· π¬π§ | - |
| Contrat de License de Logiciel Libre CeCILL (v. 2.1) | π«π· π¬π§ | - |
| Common Public License (v. 0.5) | π¬π§ | - |
| Common Public License (v. 1.0) | π¬π§ | - |
| Cryptographic Autonomy License (v.1.0) | π¬π§ | - |
| Deutsche Freie Softwarelizenz (d-fsl) | π¬π§ | - |
| Eclipse Public License (v. 1.0) | π¬π§ | - |
| European Union Public License (v. 1.0) | π¬π§ | - |
| European Union Public Licence (v. 1.1) | π¬π§ | - |
| European Union Public Licence (v. 1.2) | π¬π§ | - |
| German Free Software License | π¬π§ | - |
| IBM Public License | π¬π§ | - |
| Intel Open Source License | π¬π§ | - |
| IPA Font License | π¬π§ | - |
| No Limit Public License | π¬π§ | - |
| Non-Profit Open Software License 3.0 | π¬π§ | - |
| Open Group Public License | π¬π§ | - |
| Open Software License 1.0 | π¬π§ | - |
| Open Software License 2.0 | π¬π§ | - |
| Open Software License 2.1 | π¬π§ | - |
| Open Software License 3.0 | π¬π§ | - |
| Reciprocal Public License (v. 1.0) | π¬π§ | - |
| Reciprocal Public License (v. 1.1) | π¬π§ | - |
| Reciprocal Public License (v. 1.3) | π¬π§ | - |
| Reciprocal Public License (v. 1.5) | π¬π§ | - |
| SIL Open Font License (v. 1.0) | π¬π§ | - |
| SIL Open Font License (v. 1.1) | π¬π§ | - |
| Salutation Public License | π¬π§ | - |
| Software AG License Terms (Quip License) (v. 1.3) | π¬π§ | - |
| Transitive Grace Period Public Licence (v. 1.0) | π¬π§ | - |
| vhf Public License | π¬π§ | - |
| VOSTROM Public License for Open Source | π¬π§ | - |
Licenses with Weak Copyleft
Licenses with weak copyleft have a copyleft effect, which does not include all derived works, but contains defined exceptions.
MPL-style Licenses
MPL-style licenses have file-based Copyleft, i.e. if modifications of the software are implemented in separate files, these files can also be redistributed under other, e.g. proprietary license terms. The aim is to facilitate the combination of software under different license types.
| Lizenz | Text | SPDX-tag |
|---|---|---|
| Common Development and Distribution License (CDDL) (v. 1.0) | π¬π§ | - |
| Common Development and Distribution License, Version 1.1 (CDDL v 1.1) | π¬π§ | - |
| Common Public Attribution License (v. 1.0) | π¬π§ | - |
| Computer Associates Trusted Open Source License (v. 1.1) | π¬π§ | - |
| CUA Office Public License (v. 1.0) | π¬π§ | - |
| Erlang Public License (v. 1.1) | π¬π§ | - |
| gSOAP Public License (v. 1.0) | π¬π§ | - |
| gSOAP Public License (v. 1.1) | π¬π§ | - |
| gSOAP Public License (v. 1.2) | π¬π§ | - |
| gSOAP Public License (v. 1.3) | π¬π§ | - |
| gSOAP Public License (v. 1.3a) | π¬π§ | - |
| gSOAP Public License (v. 1.3b) | π¬π§ | - |
| ICS Open Source Public License | π¬π§ | - |
| Interbase Public License | π¬π§ | - |
| Mozilla Public License (v. 1.0) | π¬π§ | - |
| Mozilla Public License (v. 1.1) | π¬π§ | - |
| Mozilla Public License (v. 2.0) | π¬π§ | - |
| NASA Open Source Agreement (v. 1.1) | π¬π§ | - |
| NASA Open Source Agreement (v. 1.3) | π¬π§ | - |
| Netizen Open Source License (NOSL) | π¬π§ | - |
| Nokia Open Source License | π¬π§ | - |
| Open Public License (v. 1.0) | π¬π§ | - |
| Open Telecom Public License | π¬π§ | - |
| Openbravo Public License | π¬π§ | - |
| OpenC++ License Terms | π¬π§ | - |
| RedHat eCos Public License (RHEPL) (v. 1.1) | π¬π§ | - |
| Ricoh Source Code Public License | π¬π§ | - |
| SNIA Public License Version (v.1.1) | π¬π§ | - |
| SugarCRM Public License (v. 1.1.3) | π¬π§ | - |
| Sun Industry Standards Source License (v. 1.0) | π¬π§ | - |
| Sun Industry Standards Source License (v. 1.1) | π¬π§ | - |
| Sun Industry Standards Source License (v. 1.2) | π¬π§ | - |
| Sun Public License | π¬π§ | - |
| Sun Public License v1.0 | π¬π§ | - |
| Sybase Open Watcom Public License 1.0 (FTP Link) | π¬π§ | - |
| Zend Engine License (v. 2.0) | π¬π§ | - |
| Zenplex Public License | π¬π§ | - |
| Vtiger Public License (v. 1.2) | π¬π§ π©πͺ | - |
| Zimbra Public License (ZPL) (v. 1.2) | π¬π§ | - |
| Zimbra Publice License (v. 1.3) | π¬π§ | - |
| Zimbra Publice License (v. 1.4) | π¬π§ | - |
Other Licenses with Weak Copyleft
| Lizenz | Text | SPDX-tag |
|---|---|---|
| Adaptive Public License (v.1.0) | π¬π§ | - |
| Apple Public Source License (v. 2.0) | π¬π§ | - |
| BitTorrent Open Source License (v. 1.0) | π¬π§ | - |
| Bremer Lizenz fΓΌr freie Softwarebibliotheken (OSCI-Lizenz) (v. 1.0) | π¬π§ | - |
| CeCILL-C Free Software License Agreement | π¬π§ | - |
| Common UNIX Printing System License Agreement | π¬π§ | - |
| Contrat de License de Logiciel Libre CeCILL-C | π¬π§ | - |
| Cougaar Open Source License Agreement (Einordnung unklar) | π¬π§ | - |
| Eclipse Public License (v. 2.0) | π¬π§ | - |
| GNU General Public License v2.0 w/Bison exception | π¬π§ | - |
| GNU General Public License v2.0 w/Classpath exception | π¬π§ | - |
| GNU General Public License v2.0 w/Font exception | π¬π§ | - |
| GNU General Public License v2.0 w/GCC Runtime Library exception | π¬π§ | - |
| GNU General Public License v3.0 w/Autoconf exception | π¬π§ | - |
| GNU General Public License v3.0 w/GCC Runtime Library exception (RLE 3.0) | π¬π§ | - |
| GNU General Public License v3.0 w/GCC Runtime Library exception (RLE 3.1) | π¬π§ | - |
| GNU Library General Public License (LGPL) (v. 2.0) | π¬π§ | - |
| GNU Lesser General Public License (LGPL) (v. 2.1) | π¬π§ | - |
| GNU Lesser General Public License (LGPL) (v. 3.0) | π¬π§ π©πͺ | - |
| Hi-Potent Open Source License | π¬π§ | - |
| Jabber Open Source License | π¬π§ | - |
| Microsoft Reciprocal License (Ms-RL) | π¬π§ | - |
| Motosoto Open Source License (v. 0.9.1) | π¬π§ | - |
| Open CASCADE Technology Public License (v. 6.6) | π¬π§ | - |
| wxWindows License (v. 1.0) | π¬π§ | - |
| wxWindows Library License (v. 3.0) | π¬π§ | - |
| wxWindows Library License (v. 3.1) | π¬π§ | - |
| Yahoo! Public License (YPL) (v. 1.1) | π¬π§ | - |
Licenses with Choice Options
DSome licenses have different legal consequences, depending on how extensive a modification is. In addition, the licensee is given various options as to how further developments can be redistributed.
| Lizenz | Text | SPDX-tag |
|---|---|---|
| ANTLR 2 License | π¬π§ | - |
| Artistic License (v. 1.0) | π¬π§ | - |
| Artistic License (v. 2.0) | π¬π§ | - |
| Clarified Artistic License | π¬π§ | - |
| Frameworx Open License (v. 1.0) | π¬π§ | - |
| Keith Devensβ Open Source License | π¬π§ | - |
| LaTeX Project Public License (LPPL) (v. 1.0) | π¬π§ | - |
| LaTeX Project Public License (LPPL) (v. 1.1) | π¬π§ | - |
| LaTeX Project Public License (LPPL) (v. 1.2) | π¬π§ | - |
| LaTeX Project Public License (LPPL) (v. 1.3b) | π¬π§ π©πͺ | - |
| LaTeX Project Public License (LPPL) (v. 1.3c) | π¬π§ | - |
| Physnet Package License | π¬π§ | - |
| Ruby License | π¬π§ | - |
| SFL License Agreement | π¬π§ | - |
| SGI Free Software License B (v. 1.0) (Einordnung unklar) | π¬π§ | - |
| SGI Free Software License B (v. 1.1) (Einordnung unklar) | π¬π§ | - |
| Short code license | π¬π§ | - |
| Sleepycat License | π¬π§ | - |
| Sleepycat Software Product License | π¬π§ | - |
| Vim License | π¬π§ | - |
Licenses with Privileges
The licenses with privileges grant the licensees all of the rights that make up Free Software, but at the same time provide special privileges for the licensor in the event of modifications by the licensee. These licenses are mostly used with programs that were originally distributed proprietarily.
| Lizenz | Text | SPDX-tag |
|---|---|---|
| Apple Public Source License 1.0 (Einordnung unklar) | π¬π§ | - |
| Apple Public Source License 1.1 (Einordnung unklar) | π¬π§ | - |
| Apple Public Source License 1.2 (Einordnung unklar) | π¬π§ | - |
| Macromedia Open Source License Agreement (v. 1.0) | π¬π§ | - |
| Netscape Public License (NPL) (v. 1.0) | π¬π§ | - |
| Netscape Public License (NPL) (v. 1.1) | π¬π§ | - |
| OCLC Research Public License (v. 1.0) | π¬π§ | - |
| OCLC Research Public License (v. 2.0) | π¬π§ | - |
| Open Map Software License Agreement | π¬π§ | - |
| Q Public License (v. 1.0) (QPL) | π¬π§ | - |
| RealNetworks Community Source License - Research and Development Use (RCSL R&D) (v 2.0) | π¬π§ | - |
| RealNetworks Community Source License - Research and Development Use (RCSL R&D) (v 3.0) | π¬π§ | - |
| RealNetworks Public Source License (RPSL) (v. 1.0) | π¬π§ | - |
| RedHat eCos Public License (RHEPL) (v. 1.1) | π¬π§ | Β |