There are various characters and shared universes that have been 'open sourced' in some way. Here are a couple of starting points: https://pdsh.fandom.com/wiki

There are various characters and shared universes that have been 'open sourced' in some way. Here are a couple of starting points: https://pdsh.fandom.com/wiki/Category:Open_Source_Characters https://pdsh.fandom.com/wiki/Category:Open_Source_Characters http://free-universe.myartsonline.com/ http://free-universe.myartsonline.com/ https://paradisichronicles.wordpress.com/ https://paradisichronicles.wordpress.com/ https://www.thefifthworld.com/about/shared-universe https://www.thefifthworld.com/about/shared-universe http://www.scpwiki.com/ http://www.scpwiki.com/