Simmer (formerly Foodie) - Yelp, but for every dish on the menu
Travel Diaries - Create your own travel diary to capture your experiences
Spoon University - Food network for next generation.
RoomForTea - A female-friendly housing network in London, UK.
NYT Cooking - iPhone app with 17,000 free recipes from The New York Times
Planmesh - The easiest way to plan with friends