Goodreads - See what your friends are reading.
lib.reviews - a free, open and not-for-profit platform for reviewing absolutely anything, in any language.
aNobii - aNobii is a social network for listing books, sharing insights, and meeting people.
BookSloth - Book Sloth lets you add books, post and see reviews as well as interact with other readers.
CNET - CNET is a website that provides you with the latest tech news and tech reviews. The homepage of the website is a huge feed of the latest tech stories that would take you hours to sort through. Read more about CNET.
Read This Twice - Verified book recommendations from people we look up to