Magnus - Shazam for art
GoodBooks.io - Largest curated collection of 8,500+ book recommendations.
Facebook Marketplace - Marketplace is a convenient destination on Facebook to discover, buy and sell items with people in your community.
BookAuthority - BookAuthority collects the most recommended books on business, technology and science - as featured on CNN, Inc and Forbes
Lancerlist - Find freelancers in your city
Goodreads - See what your friends are reading.