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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Academic Free License v. 3.0 AFL-3.0
Attribution Assurance License AAL
Eiffel Forum License, Version 2 EFL-2.0
Fair License Fair
Historical Permission Notice and Disclaimer HPND
Lucent Public License Version 1.02 LPL-1.02
OpenLDAP Public License Version 2.8 OLDAP-2.8
The PostgreSQL Licence PostgreSQL
The University of Illinois/NCSA Open Source License NCSA
The X.Net, Inc. License Xnet
Zope Public License 2.1 ZPL - 2.1