Meetup - Helps groups of people with shared interests plan events and facilitates off line group meetings in various localities around the world.
Noodles - Cook better with a home for all your recipes.
Event Hunt - Startups and Tech Events Curated By Locals
Famealy - The online meal calendar your family will love
Eventbrite - Discover Great Events or Create Your Own & Sell Tickets
EatHow - Figure out what to make with the food you already have