• Academic Free License 3.0AFL-3.0PermissiveLawrence Rosen2005Lawrence Rosen — 2005 — A permissive license with explicit patent grant language, often discussed alongside OSL from the same author.
• Apache License 2.0Apache-2.0PermissiveApache Software Foundation2004Apache Software Foundation — 2004 — A widely-used permissive license with an explicit patent grant, used across much of the open source ecosystem.
• Artistic License 2.0Artistic-2.0PermissivePerl Foundation / open source community2006Perl Foundation / open source community — 2006 — A flexible license balancing free redistribution with a structured approach to modified versions; common in Perl ecosystems.
• Boost Software License 1.0BSL-1.0PermissiveBoost community2003Boost community — 2003 — A short permissive license popular in C++ libraries because of its simplicity and explicit redistribution grant.
• BSD 2-Clause LicenseBSD-2-ClausePermissiveUniversity of California / BSD tradition1999University of California / BSD tradition — 1999 — A simple permissive BSD license with attribution and disclaimer, but without the advertising clause.
• BSD 3-Clause LicenseBSD-3-ClausePermissiveUniversity of California / BSD tradition1999University of California / BSD tradition — 1999 — The common modern BSD license with attribution, disclaimer and a non-endorsement clause.
• BSD 4-Clause LicenseBSD-4-ClausePermissiveUniversity of California / BSD tradition1980sUniversity of California / BSD tradition — 1980s — The historical BSD license variant including the old advertising clause; less convenient, but important to archive.
• BSD Zero Clause License0BSDPermissiveSPDX / community usage2016SPDX / community usage — 2016 — An extremely permissive “public-domain-like” BSD variant with essentially no conditions beyond warranty disclaimer.
• Creative Commons Attribution 4.0CC-BY-4.0PermissiveCreative Commons2013Creative Commons — 2013 — The standard permissive license for cultural works, documentation and open data. Any use is allowed as long as the author is credited.
• Creative Commons Zero 1.0 UniversalCC0-1.0PermissiveCreative Commons2009Creative Commons — 2009 — A public-domain dedication instrument widely used for code snippets, data, test fixtures and reference material.
• ISC LicenseISCPermissiveInternet Systems Consortium1990sInternet Systems Consortium — 1990s — A concise permissive license often described as functionally similar to simplified BSD and MIT forms.
• MIT LicenseMITPermissiveMassachusetts Institute of Technology (historical form)1980sMassachusetts Institute of Technology (historical form) — 1980s — The most common short permissive license: minimal obligations, broad reuse rights, and near-universal tooling support.
• PostgreSQL LicensePostgreSQLPermissivePostgreSQL Global Development Group1996PostgreSQL Global Development Group — 1996 — A permissive license in the BSD tradition, closely associated with PostgreSQL and related tools.
• Python License 2.0Python-2.0PermissivePython Software Foundation2001Python Software Foundation — 2001 — The permissive PSF-family license associated with Python releases and parts of the Python ecosystem.
• The UnlicenseUnlicensePermissivePublic domain dedication form2010Public domain dedication form — 2010 — A public-domain-style dedication with fallback license text for jurisdictions where pure public domain is uncertain.
• University of Illinois/NCSA Open Source LicenseNCSAPermissiveUniversity of Illinois / NCSA2004University of Illinois / NCSA — 2004 — A permissive academic-origin license used by notable infrastructure and compiler projects.
• zlib LicenseZlibPermissiveJean-loup Gailly / Mark Adler tradition1995Jean-loup Gailly / Mark Adler tradition — 1995 — A short permissive license frequently used in compression, graphics and systems libraries.