OSI Approved Licenses

Open source licenses are licenses that comply with the Open Source Definition – in brief, they allow software to be freely used, modified, and shared. To be approved by the Open Source Initiative (also known as the OSI) a license must go through the Open Source Initiative’s license review process.


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1-clause BSD License BSD-1-Clause
Academic Free License v. 3.0 AFL-3.0
Adaptive Public License 1.0 APL-1.0
Apache License, Version 2.0 Apache-2.0
Apache Software License, version 1.1 Apache-1.1
Apple Public Source License 2.0 APSL-2.0
Artistic License (Perl) 1.0 Artistic-1.0-Perl
Artistic License 1.0 Artistic-1.0
Artistic License 2.0 Artistic-2.0
Attribution Assurance License AAL
Boost Software License 1.0 BSL-1.0
BSD+Patent BSD-2-Clause-Patent
Cea Cnrs Inria Logiciel Libre License, version 2.1 CECILL-2.1
CERN Open Hardware Licence Version 2 – Permissive CERN-OHL-P-2.0
CERN Open Hardware Licence Version 2 – Strongly Reciprocal CERN-OHL-S-2.0
CERN Open Hardware Licence Version 2 – Weakly Reciprocal CERN-OHL-W-2.0
Common Development and Distribution License 1.0 CDDL-1.0
Common Public Attribution License Version 1.0 CPAL-1.0
Common Public License Version 1.0 CPL-1.0
Computer Associates Trusted Open Source License 1.1 CATOSL-1.1
Cryptographic Autonomy License CAL-1.0
CUA Office Public License CUA-OPL-1.0
Eclipse Public License -v 1.0 EPL-1.0
Eclipse Public License version 2.0 EPL-2.0
eCos License version 2.0 eCos-2.0
Educational Community License, Version 1.0 ECL-1.0
Educational Community License, Version 2.0 ECL-2.0
Eiffel Forum License, version 1 EFL-1.0
Eiffel Forum License, Version 2 EFL-2.0
Entessa Public License Version. 1.0 Entessa
EU DataGrid Software License EUDatagrid
European Union Public License, version 1.2 EUPL-1.2
Fair License Fair
Frameworx License 1.0 Frameworx-1.0
GNU Affero General Public License version 3 AGPL-3.0-only
GNU General Public License version 2 GPL-2.0
GNU General Public License version 3 GPL-3.0-only
GNU General Public License, version 1
GNU Lesser General Public License version 2.1 LGPL-2.1
GNU Lesser General Public License version 3 LGPL-3.0-only
GNU Library General Public License version 2 LGPL-2.0-only
Historical Permission Notice and Disclaimer HPND
IBM Public License Version 1.0 IPL-1.0
ICU License ICU
Intel Open Source License Intel
IPA Font License IPA
ISC License ISC
Jabber Open Source License
JAM License Jam
LaTeX Project Public License, Version 1.3c LPPL-1.3c
Lawrence Berkeley National Labs BSD Variant License BSD-3-Clause-LBNL
Licence Libre du Québec – Permissive version 1.1 LiLiQ-P-1.1
Licence Libre du Québec – Réciprocité forte version 1.1 LiLiQ-Rplus-1.1
Licence Libre du Québec – Réciprocité version 1.1 LiLiQ-R-1.1
Lucent Public License Version 1.02 LPL-1.02
Lucent Public License, Plan 9, version 1.0 LPL-1.0
Microsoft Public License MS-PL
Microsoft Reciprocal License MS-RL
MirOS License MirOS
MIT No Attribution License MIT-0
MITRE Collaborative Virtual Workspace License
Motosoto Open Source License Motosoto
Mozilla Public License 1.1 MPL-1.1
Mozilla Public License 2.0 MPL-2.0
Mozilla Public License, version 1.0 MPL-1.0
Mulan Permissive Software License v2 MulanPSL-2.0
Multics License Multics
NASA Open Source Agreement v1.3 NASA-1.3
NAUMEN Public License Naumen
Nokia Open Source License Version 1.0a NOKIA
Non-Profit Open Software License version 3.0 NPOSL-3.0
NTP License NTP
Open Group Test Suite License OGTSL
Open Logistics Foundation License v1.3 OLFL-1.3
Open Software License 2.1 OSL-2.1
Open Software License, version 1.0 OSL-1.0
OpenLDAP Public License Version 2.8 OLDAP-2.8
OSET Public License version 2.1 OSET-PL-2.1
PHP License 3.0 PHP-3.0
PHP License 3.01 PHP-3.01
Python License, Version 2 PSF-2.0
RealNetworks Public Source License Version 1.0 RPSL-1.0
Reciprocal Public License 1.5 RPL-1.5
Reciprocal Public License, version 1.1 RPL-1.1
Simple Public License SimPL-2.0
Sun Industry Standards Source License SISSL
Sun Public License, Version 1.0 SPL-1.0
The 2-Clause BSD License BSD-2-Clause
The 3-Clause BSD License BSD-3-Clause
The CNRI portion of the multi-part Python License CNRI-Python
The European Union Public License, version 1.1 EUPL-1.1
The MIT License MIT
The Nethack General Public License NGPL
The OCLC Research Public License 2.0 License
The Open Software License 3.0 OSL-3.0
The PostgreSQL Licence PostgreSQL
The Q Public License Version QPL-1.0
The Ricoh Source Code Public License RSCPL
The Sleepycat License Sleepycat
The Sybase Open Source Licence Watcom-1.0
The Universal Permissive License Version 1.0 UPL-1.0
The University of Illinois/NCSA Open Source License NCSA
The Unlicense Unlicense
The Vovida Software License v. 1.0 VSL-0.1
The wxWindows Library Licence wxWindows
The X.Net, Inc. License Xnet
The zlib/libpng License Zlib
Unicode, Inc. License Agreement – Data Files and Software Unicode-DFS-2015
Upstream Compatibility License v1.0 UCL-1.0
Zero-Clause BSD 0BSD
Zope Public License 2.0 ZPL - 2.0
Zope Public License 2.1 ZPL - 2.1