Convert points/paths to KML

DNR Garmin
GPS Visualizer
GPSBabel

Geo-tagging Photos

ExifTool
Picasa
Flickr
gpssync
KML2KML (Windows)
HoudahGeo (Mac OS)

Trail Logs

wikiloc
MTBGuru
EveryTrail
Magnalox

Dynamic Tracking

Goops
Navigator