CC0 1.0 Universal

This is a free, libre and open license.

https://creativecommons.org/publicdomain/zero/1.0/

Details

Created by Creative Commons

Wikidata Q6938433

License certification GPL-compatible free software license, Open Definition recommended conformant license, Definition of Free Cultural Works conformant license

Supersedes

• Public Domain Dedication

Notes

Why CC0 is not approved by the Open Source Initiative.

Content under license

• 1923: A Monthly Zine of Public Domain Treasures — entirety
• Adventures With Anxiety! — entirety
• Aelius Blythe
• All the Music LLC — entirety
• Archaeology, Anthropology and Interstellar Communication
• Aural Tradition
• Barn Images — Photos from early 2015 before the site changed license — https://web.archive.org/web/20150908223553/http://barnimages.com/about/
• Blend Swap — part
• cc0.photo — entirety
• Center for the Study of Innovative Freedom
• CIA: Collect It All — part — Based on the CIA’s Collection Deck by David Clopper, which is public domain under 17 USC §105. Some card text from AH Game’s version of Collection Deck (www.ahgames.shop), licensed under Creative Commons CC-BY. All other content is by Techdirt & Diegetic Games and placed in the public domain using CC0. Resolution cards inspired by Archipelago/Itras By. Thanks to Jon Callas Oifrhs Eohlpn Hnteec Yirpto Cdnar.
• Cities Without Number — The full SRD, but not all parts of the original book.
• Cleveland Museum of Art — part — Collection search can be limited to open access only
• Comic Neue — unclear
• Commonly
• Communia
• Cost of Freedom — entirety
• Crow the Stone — entirety
• Cupcake — entirety — All photos here on www.cupcake.nilssonlee.se are licensed under the Creative Commons license CC0, which means that you are free to use the images without any costs. You can copy, modify, distribute and perform the work, even for commercial purposes, all without asking for permission. Although, you’re more than welcome to let me know if you use images for a website, illustration or whatever, it’s inspiring to see the results.
• FancyCrave — For a time, all photos on the site. — "Photographs are provided free of charge and under the Creative Commons Public Domain CC0 license." https://web.archive.org/web/20160103120712/http://fancycrave.com/TermsandServices
• Farmbot — Hardware, documentation
• Fodongo: A Free-Culture Comics Zine
• Free Culture Guide
• Free Nature Stock — entirety — http://freenaturestock.com/about
• Glitch The Game
• Harvard Library Open Metadata
• Hexoshi — part
• Insects Unlocked — entirety
• jay mantri — entirety
• Kenney — unclear — Each asset has a license listed; for the ones I checked, it was this one.
• Letters for Black Lives — entirety
• Little Visuals — entirety
• Magdeleine — entirety — It's not clear which CC BY or CC BY-SA version applies.
• Maki
• Michele Bucelli — part
• Mike Shaw
• MMT — entirety
• Moveast — entirety
• Musescore
• Museums Victoria Collections — part — the metadata
• Musopen Collection
• Negative Space — entirety
• New Midnight Cassette System — entirety
• New Palmyra — entirety
• Nothing To Hide
• Open Adventure: Fantasy Core Rules
• Open English Bible
• Open Goldberg Variations
• Open Pixel Project — entirety
• Open Source Food Safety — "All downloadable materials": https://web.archive.org/web/20190825180808/http://www.opensourcefoodsafety.org/published-plans
• Openaddresses — part — "Released under a CC0 License. Individual datasets carry respective license."
• Openclipart — entirety — https://openclipart.org/share
• Paleobiology Database — https://docs.google.com/document/d/e/2PACX-1vQPrlNL2sUTFbZAzZFs2Jhs4j-1h3RfAIFNl54JstnHfxhhRcjMGImGU4VRk89C9Er_kNEWj7NTAqaR/pub
• Pexels — As of about 2016 — "It's hard to understand complex licenses that is why all photos on Pexels are licensed under the Creative Commons Zero (CC0) license." https://web.archive.org/web/20160912205607/https://www.pexels.com/photo-license/
• Photo Collections — entirety
• Photocrops — entirety — http://www.photocrops.com/about/#license
• Picography — entirety — http://picography.co/terms/
• Pixabay — The site's terms and conditions purport to limit how the photos can be used. https://web.archive.org/web/20181129125001/https://pixabay.com/en/service/faq/
• Public Domain Archive — Used earlier
• Rad Geek People's Daily — entirety — http://radgeek.com/about/anticopyright/
• rawpixel — part — The public domain section is the only one covered by this license.
• re:splashed — entirety
• Realistic Shots — entirety — http://realisticshots.com/terms - "All photos published on Realistic Shots are licensed under Creative Commons Zero which means you can copy, modify, distribute and use the photos, even for commercial purposes. Attribution is not required, but appreciated."
• ReTux — All assets are free and open, but under a range of licenses.
• Roadkill
• Safecast
• Seder-Masochism — animation and images — All of Paley’s animation and images will be free for anyone to use however they wish; however the music will continue to be controlled by its copyright holders. https://sedermasochism.com/2019/01/02/press-release-seder-masochism-to-go-public-domain-january-31-2019/
• Sharing Is Caring — The license status of the work isn't mentioned on the main site, but is confirmed on the [Creative Commons UK](http://www.creativecommons.org.uk/blog/tabid/84/EntryId/22/Dan-Bull-reaches-number-9-in-the-Indie-charts-with-music-to-which-he-has-waived-copyright-using-CC0.aspx) site.
• Sita Sings the Blues
• Skitterphoto
• Smithsonian Open Access — entirety
• SpaceX Photos
• Startup Stock Photos — entirety — Although note the terms of use: http://startupstockphotos.com/terms-of-use
• Stephen Kinsella — entirety
• Superpowers Asset Packs — entirety
• Taming Fire — entirety — To the extent possible under law, Aaron Pogue has waived all copyright and related or neighboring rights to Taming Fire (The Dragonprince Trilogy, #1). This work is published from: United States. See: https://web.archive.org/web/20140818091924/http://www.consortiumokc.com/books/taming-fire/
• The Case For Copyright Reform
• The Collected Writings Of Jeremy Kellerman Volume One
• The Dragonswarm
• The Freesound Project
• The Infinite Voyager
• The Libre Art of the Fugue — entirety
• The Open Game Art Bundle
• The Open Well-Tempered Clavier — entirety
• The Peeragogy Handbook
• The Pic Pac — entirety
• The Public Domain Game Jam
• travel coffee book — entirety
• unglue.it — part
• Unsplash — Now a limited set: https://unsplash.com/s/photos/cc0
• Valentin Champer's COPYME Editions
• Waiting... — entirety
• Wealth Inequality In America
• Wikidata
• Worlds Without Number — The full SRD, but not all parts of the original book.
• Wuffle Comics