Goodreads - See what your friends are reading.
Startup Stash - A curated directory of 400 resources & tools for startups
LibraryThing - A home for your books.
Stackshare - StackShare is a comprehensive website that gives its users the chance to organize and share their technology stack with the rest of the community.
GoodBooks.io - Largest curated collection of 8,500+ book recommendations.
Makerbook - A directory of the best free resources for creatives