this page is a list of articles and web resources to get the most of driving routes. Note that these are 3rd party resources that may change, or may not be free.

Websites:

gpx.studioA good mapping website (note app is in beta, but it is free).
Hint: choose Motorcycle for route type, as there is no Car.
roadcurvature.comA map showing the curviness of roads.
Google MapsThe standard in GPS maps.
kml2gpx.comA simple site to convert Google .kml files to .gpx files

Phone apps (note some navigation apps need a network connection)

GPX trackerA handy app for recording routes while driving. IOS only
Roads by Porchegpx navigation app for IOS and Android