Free New York City (NYC) Subway Locator. This app will quickly display a list of the nearest Subway Stations to your current location.
The app also includes several other great features:
-The Official MTA Subway Map for offline viewing.
-Service Alerts straight from MTA
-Google Map to plot stations and the ability to drill down to actual Entrances
-Selector to choose which subway routes to filter
Made by a New Yorker.