GoodBooks.io - Largest curated collection of 8,500+ book recommendations.
Goodreads - See what your friends are reading.
Postmake - Postmake is a directory of curated tools and resources for your next project. Browse tools for design, development, marketing, and more, or submit a new resource.
LibraryThing - A home for your books.
Puzzleskill - Book recommendations from industry leaders
BookAuthority - BookAuthority collects the most recommended books on business, technology and science - as featured on CNN, Inc and Forbes