Story Pony - Story Pony is a quality focused writing platform which allows authors to share their stories online.
HaikuJAM - Create collaborative poetry with friends or strangers
Poemix - Remix your text into poetry
Commaful - Largest multimedia fiction site in the world. A lot of short stories, poetry, and fanfiction.
Storybird - Visual storytelling community
Doom Haikus 2020 - Explore 2,700 gloomy haikus about 2020 news