GpsPhoto.pl geotags digital photos by using GPS track data recorded at the same time. Matches are based on closest timestamps. An optionally generated Google Earth KML or KMZ file contains the GPS tracks and the geotagged photos.
VALARI is a Virtual Announced Launch And Recovery Informant for Mac OSX for GPS & Telemetry tracking of modern high power rocketry.
Eventually we might port this to other OSes.