Goodreads - See what your friends are reading.
Readernaut - We are a small community of readers, sharing our adventures and supporting each other as we persue a life of learning.
BookSloth - Book Sloth lets you add books, post and see reviews as well as interact with other readers.
BookLikes - BookLikes is a free blog platform for book lovers. 100% independent and free.
Read This Twice - Verified book recommendations from people we look up to
LibraryThing - A home for your books.