Photo Geo Logger

Use your phone to log your GPS location with Photo Geo Logger. Instead of running continuously and draining your battery, you simply open the app and hit the "Log" button at the point where you take your picture. The app produces a GPX output file which can then be used by any geo tagging software. You can save the GPX file to the phone or email it. The app also supports dividing your locations into multiple trips, allows you to name each location, and uses Google Maps to view locations directly on your phone.