• Open Software License 3.0OSL-3.0CopyleftLawrence Rosen2005Lawrence Rosen — 2005 — A strong copyleft license with explicit patent language and conditions oriented toward modern software distribution.
• 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.
• SIL Open Font License 1.1OFL-1.1CopyleftSIL International2005SIL International — 2005 — The standard free license for fonts: fonts may be used, modified and redistributed, but must stay under the OFL.
• 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.