Storyboard That - Storyboard That is the world's best online storyboard creator.
Novelize - Novelize is an online novel writing app designed to keep authors on track.
Storybird - Visual storytelling community
Manuskript - Open-source tool for writers.
Storyboarder - Storyboarder makes it easy to visualize a story as fast you can draw stick figures.
BlankPage - Stay motivated to write, and finish your story