Meetup - Helps groups of people with shared interests plan events and facilitates off line group meetings in various localities around the world.
Poppylist - Baby product recommendations powered by parents
Event Hunt - Startups and Tech Events Curated By Locals
Babylist.com - Put anything onto your baby registry from any store.
Eventbrite - Discover Great Events or Create Your Own & Sell Tickets
Thistle - Healthy meal plans with food deliveries.