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


  • Entropy Of Imagination'The inhabitants of this future Web reside in a closed system, where all possible experiences will soon be exhausted. The Web is winding down, falling into stasis. Here, Flatline is a brief infusion of novelty, bringing chaos to the system.'
  • Entypo'Entypo is a set of 250+ carefully crafted pictograms. The package contains an icon font'
  • Envisioning Technology'Envisioning Technology is an award-winning tech-trend forecasting studio with people in London, São Paulo and New York.'
  • Epées & SorcellerieA game inspired by Original Dungeons & Dragons with some modern changes.
  • Errant RPGA fantasy role-playing game.
  • EveryCook'Better food through information.'
  • Evil Wizards in a Cave'Evil Wizards in a Cave is a short adventure module compatible with both the Dungeon World and Labyrinth Lord fantasy role-playing games.'
  • Fairphone'You can change the way products are made, starting with a single Phone. Together, we’re opening up the Supply Chain, and redefining the Economy – one step at a time.'
  • Fantastic Heroes & WitcheryAn extensive tabletop RPG.
  • Fantastique UnfetteredA magazine of short stories.
  • Fantasy Craft%%form_data{intro}%%
  • Fantasy CraftA fantasy RPG based on the MasterCraft engine.
  • Farm Taken OverA simple HTML5 game for the Liberated Pixel Cup.
  • FASTA light and simple skill-based RPG.
  • FATE 2EA universal game based on the FATE engine.
  • Fate Accelerated EditionA lite version of the fractal role-playing game Fate.
  • Fate Core SystemAn extended version of the fractal role-playing game Fate.
  • Fate System ToolkitA toolkit for the Fate tabletop RPG.
  • Ficly (Jenny Everywhere)Ficly microfiction about Jenny Everywhere.
  • Fire & SwordAn evolution of RuneQuest.
  • For Gold & GloryA retroclone of 2E AD&D.
  • Forall X: An Introduction To Formal Logic'This text describes two formal languages which have been of special importance to philosophers: truth-functional sentential logic and quantified predicate logic. The book covers translation, formal semantics, and proof theory for both languages.'
  • Forge'This is an HTML5 game. It’s extremely incomplete.'
  • Fortune System Resource Document'The Fortune System Resource Document includes the basic rules of the Fortune System. It also includes advice from existing Fortune System designers.'
  • Four Colors al FrescoPlay a superhero in the Italian Renaissance.
  • Free as in FreedomA biography of free software guru Richard Stallman.
  • Free BeerA libre recipe for beer.
  • Free Beer (book)A book about free software and free culture from the speakers at FSCONS 2008.
  • Free FATEA free, expanded version of FATE.
  • FreeBassel CookbookCookbook made in solidarity with Bassel, a prisoner of the Syrian regime.
  • French GovernmentTwo French cultural websites.
  • FringeA half-finished RPG designed by committee.
  • FUBARYou've been screwed … and at least one person wants you dead.
  • FudgeAn early generic RPG.
  • Full Circle MagazineA free, independent magazine for Ubuntu Linux.
  • Future of CopyrightA competition for fiction and non-fiction entries on copyright.
  • Future of Copyright 2.0A collection of fiction and non-fiction.
  • GeasaA story telling game about fickle fairies.
  • Ghost RunnerAs a Ghost Runner, you the players must track down rogue Ghosts, pulled from the afterlife and embedded into cybernetic SHELS which are used to hold these spirits to the world.
  • GIMPA program for image manipulation and creation.
  • Gimp Magazine'The goal of this publication is to promote GIMP and related open source software.'
  • Gods & MonstersAn old-school style fantasy RPG.
  • GOREA d%-based horror RPG.
  • Grand OGL WikiA collection of open game content, primarily for Dungeons & Dragons.
  • Green CometA sci-fi novel.
  • Group Works'A Pattern Language for Bringing Life to Meetings and Other Gatherings'
  • Guess Who's a Mess'Guess Who's a Mess is the third full-length Brad Sucks album. It's about dealing with other people's expectations.'
  • GUMSHOE SRD'The document is a reference for game designers, and is not tuned to teach the game, or provide a playable game experience.'
  • HabitRPG'Gamify your life'
  • Hacker Public Radio'Hacker Public Radio (HPR) is an Internet Radio show (podcast) that releases shows every weekday Monday through Friday.'


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  • Basic Dungeons & DragonsThe mechanics of original and basic D&D.
  • CC-PROA rebranding of the CC BY-SA licence to emphasise its value to professionals.
  • d20 SystemThe roleplaying system which first appeared in Dungeons & Dragons 3E.
  • FATEA 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."
  • Saga Machine'Saga Machine is a brand new tabletop role-playing system by the Tab Creations Collective.'
Unless otherwise stated, the content of this page is licensed under Creative Commons Attribution 3.0 License