Cowbird - Cowbird is a simple tool for telling stories, and a public library of human experience.
Storybird - Visual storytelling community
My Storybook - Make children's storybooks online for free.
Archive of Our Own - An Archive of Our Own, a project of the Organization for Transformative Works
Unlimited Fan Fiction - Your ad-free fanfiction archive.
Fanfiction.net - The most popular fan fiction website in the world according to Wikipedia