Open license

Creative Commons licenses are one of the most popular open licenses.

An open license or free license is a license that allows others to re-use an author's work as they wish. Without such a license, such use is generally prohibited by copyright law or a closed license.

By type of license

• Public domain licenses
  • Creative Commons CC0
    • Unlicense
  • Public Domain Dedication and License (PDDL)
• Permissive licenses
  • BSD License
  • MIT License
  • Mozilla Public License (file-based permissive copyleft)
  • Creative Commons Attribution
• Copyleft & patentleft licenses
  • GNU GPL, LGPL (weaker copyleft), AGPL (stronger copyleft)
  • Creative Commons Attribution Share-Alike
  • Mozilla Public License
  • Common Development and Distribution License
  • GFDL (without invariant sections)
  • Free Art License

By type of content

• Open-source software
  • The Open Source Definition
• Open Content
  • Open Content License
  • Open Publication License
• Open-source hardware
• Open database
  • Creative Commons v4
  • Open Database Licence

By authors

• Creative Commons
• Free Software Foundation
• Open Source Initiative
• Microsoft
  • Microsoft Public License
  • Microsoft Reciprocal License
• Open Content Project
• Open Data Commons from Open Knowledge Foundation
  • Public Domain Dedication and License (PDDL)
  • Attribution License (ODC-By)
  • Open Database License (ODC-ODbL)
• European Union
  • European Union Public Licence

Open License Media

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  Network of licenses (and years of license creation)

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  Popular free and open source licenses include the Apache License, the MIT License, the GNU General Public License (GPL), the BSD Licenses, the GNU Lesser General Public License (LGPL) and the Mozilla Public License (MPL).

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  Definition of Free Cultural Works logo, selected in a logo contest in 2006

Related pages

• Open content
• Openness