Copyleft

Copyleft works can be shared both in original form and after being adapted, but they must remain under the copyleft licence even if they are modified.

Copyleft licences are also called 'reciprocal', 'viral' and 'share alike' libre licences. However, whereas copyleft can only describe a libre work, the other three terms can also describe proprietary works that must be kept under the same (proprietary) licence when adapted.

Openness: Libre

Works and Sources

Works

• 365 Sketches ● A blog with a new sketch each day.
• 6d6 RPG ● A universal RPG.
• Adventures Of The Space Patrol ● Retro-Cute Sci-Fi Role-Playing
• Alchemy ● An electronic sketching program.
• Alchemy System ● A modified d20 game set in its own universe.
• Animalball Melee ● A simplified d20 System for gladiatorial combat.
• Anima Prime ● A fast-paced RPG inspired by manga and anime.
• Arcemu ● Arcemu is an MMORPG server framework project which currently supports World of Warcraft 3.3.5a
• Army Brats ● "Welcome to Fort Biloxi. Your parents have sent you to military school to "help you focus". What could be scarier than military school? How about being one of the new kids? Luckily, you have a cunning plan. You and the other new kids (the other players) are going to try to get expelled so you can go back to public school with all your friends."
• As The Tea Leaves Grow ● Small Toad – youngest student of Master Iron Willow – gave the rarest tea flower in Master Iron Willow's considerable collection to a passing beauty.
• Astral Dreams ● A space opera miniatures wargame.
• Backswords & Bucklers ● Fantasy dungeoncrawling in Elizabethan England.
• Basic Fantasy Role-Playing Game ● A fusion of Basic D&D with D&D 3E to create a simple, light-weight game.
• Beast Hunters ● Tattooed hunters of beasts use their fiendish blood for sorcery.
• Bloody Forks ● A LARP about the French and American battles before the War of Independence.
• Boarsdraft ● Wizards at a wizarding school, trying to pass their classes while fighting evil.
• Cap & Trade ● A game to teach people about carbon pricing.
• Cascade Failure ● Life in a post-apocalyptic future.
• Circe ● One of the first games to be open source.
• Composition Generators ● Generates collections of stripes or dots or blank canvases.
• Contagion ● A free wargame.
• Copying Is Not Theft ● A song arguing that copyright violation is not theft.
• Core Elements ● A distillation of the d20 System in just seven pages.
• Creative Commons: A User Guide ● A step-by-step guide to the world of CC licences.
• Credit Is Due ● A song by Nina Paley about attribution.
• Critical!: Go Westerly ● A light and light-hearted RPG.
• Critical Point Of View ● An INC Reader for Wikipedia.
• Cyberpunk Remix ● This game is about your crazy friends and family.
• d20 Anime ● Play magical girls, sorcerers and mecha pilots using everyone's favourite system.
• d20 Modern ● Modern role-playing, from occult investigation to special ops and anything in between.
• d20 Open Mass Combat System ● A free wargame.
• Dangers & Dweomers ● A merger of Swords & Wizardry and Basic Fantasy.
• Dan's Diminutive D20 ● Quick and easy d20 role-playing.
• Dark Dungeons ● A tabletop RPG based on the Rules Cyclopedia.
• Darker Dungeons ● A tabletop RPG based on a streamlined version of the Rules Cyclopedia.
• Dark Passages ● A modern fusion and re-organisation of 0E and 1E rules.
• Data Journalism Handbook ● "[A] free, open source reference book for anyone interested in the emerging field of data journalism."
• Diaspora ● Singularity FATE-based role-playing.
• DIYLILCNC ● Plans for a simple, cheap CNC mill.
• Dominion Rules ● Medieval classless fantasy role-playing.
• Donjon ● A fantasy dungeoncrawl game with significant player narrative control.
• Drafting The Gift Domain ● "an introduction to Open Content projects with respect to how they work, how they are designed, and how they continue to exist alongside Market driven entities."
• Dresden Files RPG ● A FATE RPG about modern magic.
• Drowning & Falling ● The Fantasy Role-Playing Game of Adventure and Death from Drowning and Falling
• Dungeons Daring ● A fantasy RPG designed by a committee.
• Dungeons & Dragons 3E ● The third edition of the world's most popular roleplaying game.
• Engine Heart ● An RPG in a post-human world.
• Epées & Sorcellerie ● A game inspired by Original Dungeons & Dragons with some modern changes.
• Errant RPG ● A fantasy role-playing game.
• Fantastique Unfettered ● A magazine of short stories.

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Sources

• Appropedia ● A wiki to share designs of all sorts.
• Artikid ● "[A]n Italian full-time web-developer, part-time illustrator and games geek."
• Berengad Games ● A publisher of story games.
• Brad Sucks ● "a one man band with no fans"
• ccMixter ● ccMixter is a site for Creative Commons remixes. You can listen to the music, but also sample and mash-up it.
• Center For The Study Of The Public Domain ● A center at Duke Law School.
• Commonwealth of Learning ● An organisation which encourages the sharing of research, knowledge and technology.
• Crystal Obelisk ● A collection of resources for medieval study and tabletop gaming.
• D101 Games ● A small press RPG company.
• dati.camera.it ● Data from the Italian Parliament.
• Delubrum ● The designer's own fonts and links to others.
• Desura ● A Steam-like computer game platform.
• Evil Hat Productions ● A small press RPG company.
• Ficly ● A site of microfiction where you can add sequels and prequels to the writing of others.
• Goblinoid Games ● A publisher of retro-style tabletop games.
• GoodSemester ● A place to share class notes.
• Grand OGL Wiki ● A collection of open game content from other sources.
• Gratis Games ● A provider of free retroclones.
• Greg Christopher ● An author of RPGs.
• Hungry Lucy ● A band that blends pop, haunting vocals and other styles.
• Jason Rohrer ● A game designer who writes simple but not simplistic games.
• Jeff Moore ● An RPG author.
• Jemex ● A catchy musician from Brooklyn.
• Justen Brown ● An author of retroclones.
• La Quadrature du Net ● 'La Quadrature du Net is an advocacy group defending the rights and freedoms of citizens on the Internet.'
• List of Open Source Video Games ● A page on Wikipedia.
• Nina Paley ● Question Copyright's artist in residence.
• OnlineComputerBooks.com ● A website with many free ebooks, some of which are open.
• Ookaboo ● Ookaboo has collected nearly a million images of precisely defined topics such as places, people, species and products.
• Open Font Library ● A repository of libre fonts.
• Open Game Art ● A community dedicated to providing art for open source video games.
• opensource.com ● "At opensource.com, we want to show you the places where the open source way is multiplying ideas and effort, even beyond technology."
• Open Source Ecology ● Technology for sustainable, localised, modern living.
• opsound ● A collection of copyleft songs.
• Orphan Songs ● Free Swedish rock pop music.
• P2PU ● An online learning community.
• Public Knowledge ● Preserves 'the openness of the Internet and the public's access to knowledge, promotes creativity through balanced copyright, and upholds and protects the rights of consumers to use innovative technology lawfully.'
• Qi Hardware ● 'Qi's mission is to promote and encourage the development of copyleft hardware.'
• Ryzom Asset Repository ● 3D assets from the MMORPG Ryzom.
• SIL International ● An organisation which supports language communities
• Stuart Chaplin ● Story game author.
• Teapot Dome Games ● A publisher of free role-playing games.
• Tenpenny Joke ● An alternative rock band.
• Wikipedia List of Game Engines ● A list of game engines on Wikipedia.
• Yanone ● A young German jack-of-all-trades.
• Zadkiel ● 'Zadkiel are three piece Alternative-Rock/Indie band from Nottingham.'

Licences

• Creative Commons Attribution-ShareAlike ● A Creative Commons licence which allows copying provided credit is given and adaptations fall under the same licence.
• Creative Commons ShareAlike ● A retired Creative Commons licence.
• Free Art License ● A copyleft licence designed specifically for art.
• GNU Affero General Public License ● A copyleft software licence.
• GNU Free Documentation License ● A copyleft licence for manuals and software guides.
• GNU General Public License ● A copyleft licence designed for software.
• Open Game License ● A copyleft licence designed for games but usable elsewhere.
• SIL Open Font License ● A copyleft font licence.

• Basic Dungeons & Dragons ● The mechanics of original and basic D&D.
• CC-PRO ● A rebranding of the CC BY-SA licence to emphasise its value to professionals.
• d20 System ● The roleplaying system which first appeared in Dungeons & Dragons 3E.
• FATE ● A game system based on the mechanic: dice roll + invoked and tagged Aspects.
• Liberated Pixel Cup ● "Liberated Pixel Cup is a two-part competition: make a bunch of awesome free culture licensed artwork, and then program a bunch of free software games that use it."