[notswiley2]

It's pretty much all there, it just needs to be packaged.

Also most people don't like carrying a compass and road atlas like I do so the turn by turn navigation needs to work (KDE marble will stick you on a slippy map and route for you but I don't think it does real time navigation right now.)

[tuukkah]

I wonder if anyone has evaluated the possibility of porting OsmAnd for navigation.

[bonestamp2]

Since html supports gps, I wonder if there are any web based turn by turn nav apps? I did a quick search and didn't turn up anything current, but a deeper dive might yield something.