Fanfiction.net - The most popular fan fiction website in the world according to Wikipedia
Goodreads - See what your friends are reading.
Belletristica - Your online writing platform. Share your stories and poetry with the world and become part of our community!
LibraryThing - A home for your books.
Wattpad - Wattpad is now the worlds most popular ebook community where readers and writers discover, share...
BookLikes - BookLikes is a free blog platform for book lovers. 100% independent and free.