A very powerful plugin that seamlessly integrates GPS waypoints and Garmin courses into SportTracks, features for which you would have to use Garmin Mapsource™ and Garmin TrainingCenter™ or similar 3rd party applications otherwise.

Some of the outstanding features of this plugin are:
-create courses with autorouting
-create waypoints from addresses
-elevation correction for waypoints, courses, activities and routes
-support for Geocaching (still under development)
-upload of Garmin Custom Maps (raster image maps) to GPS devices that supports these
-upload of Garmin compatible maps based on the OpenStreetMap project to Garmin devices that support mapping