MailChimp Product Recommendations - Easily build automated personalized email marketing
Meetup - Helps groups of people with shared interests plan events and facilitates off line group meetings in various localities around the world.
Flinder - Find top things to do nearby
Event Hunt - Startups and Tech Events Curated By Locals
Metisa - Product recommendations that learn as your customers shop
Eventbrite - Discover Great Events or Create Your Own & Sell Tickets