I’m a bit fed up with the current navigator (TomTom) as it turned to adware after six months of use. “Please buy new maps at http://www.tomtom.com, click this button to see what you wanted to do”.
Is there any (good) OSS navigation software with support for proprietary hardware? I’m perfectly happy to purchase separate maps and hardware for the software as long as I don’t have to give my money to TomTom or Navigon.
You should check Routing using Open Street Map.