Goodreads - See what your friends are reading.
LibraryThing - A home for your books.
GoodBooks.io - Largest curated collection of 8,500+ book recommendations.
BookLikes - BookLikes is a free blog platform for book lovers. 100% independent and free.
Bookicious - Find the best new book to read with books collections for makers, founders and entrepreneurs.
aNobii - aNobii is a social network for listing books, sharing insights, and meeting people.