Cycling: Garmin Edge 530, 540, 830, 840, 1030, 1030+, 1040, 1050 Explore. Garmin Edge 605, 705, 500, 510, 520, 520+, 800, 810, 820, 1000.
Hiking/Outdoors: Rhino, Oregon, GPSMAP 66, GPSMAP 86. Watches: fēnix, Marq, Forerunner, D2, Descent. Venu.
GRouteLoader IQ is a Garmin Connect IQ device app and widget that lets you download routes/waypoints directly to your Garmin GPS device wirelessly. (If you are a member of a bicycle club, check this out.)
GRouteLoader is a Microsoft Windows "workbench" program that makes it easy to view and copy files to (and manage files on) your Garmin GPS device. This supports USB devices as well as newer MTP devices. (You need to install additonal software for MTP support.)
BC2GE (BaseCamp to Google Earth) is a small "helper" MS Windows program for users of Google Earth and Garmin BaseCamp or users who want to easily import GPX/TCX/FIT files into Google Earth. Works well with the GRouteLoader Windows program.