Goodreads - See what your friends are reading.
Bookicious - Find the best new book to read with books collections for makers, founders and entrepreneurs.
Riffle - Just good books and the readers who love them.
LibraryThing - A home for your books.
Bookcelerator - A curated directory of books that will make you smarter
BookLikes - BookLikes is a free blog platform for book lovers. 100% independent and free.