Wattpad - Wattpad is now the worlds most popular ebook community where readers and writers discover, share...
Booksie.com - Booksie is a free online publishing site that allows writers to easily post, share, and promote their writing.
Poetryphile - Where poetry gets influential, feedback, and an audience
Royal Road - Royal Road® is the home of web novels and fan fictions!
Commaful - Largest multimedia fiction site in the world. A lot of short stories, poetry, and fanfiction.
Storybird - Visual storytelling community