I always liked Mad Maps - at least a decade ago they were really neatly designed and easy to read while in tank bag: MAD Maps, Inc. "Charting America's Backroads" - Scenic Road Trip MapsFor me, paper maps are still the best with a simple tank bag (still need to find another, had Chase Harper).
Brilliant!That's a cool idea, but not all twisty roads detected by algorithms lend themselves to good riding.
If the US, west coast in particular, I met a guy who rates almost every ride a motorcyclist would care about. It's pretty damn good
RoadRatings.com