Storybird - Visual storytelling community
My Storybook - Make children's storybooks online for free.
Imagine Forest - Create your own story online using the Imagine Forest story creator and resources. We offer story starters, fun artwork, writing games and more for kids!
Archive of Our Own - An Archive of Our Own, a project of the Organization for Transformative Works
Storyboard That - Storyboard That is the world's best online storyboard creator.
Fanfiction.net - The most popular fan fiction website in the world according to Wikipedia