Yelp - The free Yelp mobile app is the fastest and easiest way to search for businesses near you. Download it now to get started.
Swarm - Swarm lets you earn prizes and compete with friends based on the places you go.
ListPM - ListPM
Foursquare - Foursquare is all about helping you find new ways to explore your city.
Flamp - Reviews of companies in your city.
Mapstr - Your places, your world!