Goodreads - See what your friends are reading.
Wikiquote - A free quote database built collaboratively using Wiki software, a sister project to Wikipedia.
GoodBooks.io - Largest curated collection of 8,500+ book recommendations.
Quotefancy - Quotefancy is on a mission of turning inspiring quotes into beautiful wallpapers.
Bookicious - Find the best new book to read with books collections for makers, founders and entrepreneurs.
Brainyquote - Database of quotations by topic or author.