Coordinate Master (free)

This is a coordinate converter between Lat/Lon and UTM coordinates which uses the WGS84 datum.

The app either takes manual coordinate input or uses your current GPS location. The computed location can be displayed in Google Maps via your web browser with a single button press. It also supports MGRS grid references.

Permissions required: (1) GPS - to determine your location, (2) SD card access - to read projections file.