Meetup - Helps groups of people with shared interests plan events and facilitates off line group meetings in various localities around the world.
Depict.ai - Amazon-quality product recommendations for any online store
Facebook Local - Discover places to go and events happening near you
Suto - Get one-on-one expert product recommendations.
Eventbrite - Discover Great Events or Create Your Own & Sell Tickets
MailChimp Product Recommendations - Easily build automated personalized email marketing