Goodreads - See what your friends are reading.
Bookicious - Find the best new book to read with books collections for makers, founders and entrepreneurs.
Readernaut - We are a small community of readers, sharing our adventures and supporting each other as we persue a life of learning.
BookLikes - BookLikes is a free blog platform for book lovers. 100% independent and free.
Bookcelerator - A curated directory of books that will make you smarter
LibraryThing - A home for your books.