GPSTrack!

GPSTrack allows you to use the GPS receiver in your iPhone or iPad to show your current location and create a log of your travels, showing you a map of your path, updated in real-time. GPSTrack can track your location while in the background, so you can continue to use your iPhone for other tasks. )Saved tracks can be exported via e-mail in GPX and KML formats, useful if you want to geotag photos from a camera that doesnt have GPS support.