DC Metro Transit - Free

Free (with ads) mobile interface for WMATA:
-Tablet friendly layout (Honeycomb Compatibility)
-Real-time predictions: DC Metrorail, Metro Bus, Circulator, PG County-The Bus, Fairfax CUE, UMD Shuttle
-Nearest train stations & WMATA Bus stops by GPS
-Google Maps directions to each of the nearest stations/stops
-Interactive Metrorail Map
-Load StreetView from Metro Map for a station
-Train Trip Planner
-Metro rail disruptions and news
-Important WMATA contact information (press menu on the app home screen)
-Sort your favorite Metro Stations and Bus Stops by dragging the icons to the left of the station name.
-Backup your configuration to the SD card (press menu on the app home screen)
-Restore your configuration from the SD card (press menu on the app home screen)

An ad-free (paid) version is available.