eBay - Buy and sell electronics, cars, fashion apparel, collectibles, sporting goods, digital cameras, baby items, coupons, and everything else on eBay, the world's online marketplace
LibraryThing - A home for your books.
AbeBooks - AbeBooks has millions of new & used books, rare books and out of print books.
Goodreads - See what your friends are reading.
Bibliotech - Bibliotech is the Spotify for textbooks.
BookLikes - BookLikes is a free blog platform for book lovers. 100% independent and free.