Navit is a car navigation system with routing engine. Its modular
design is capable of using vector maps of various formats for routing
and rendering of the displayed map. It's even possible to use multiple
maps at a time.

The GTK+ or SDL user interfaces are designed to work well with touch
screen displays. Points of Interest of various formats are displayed
on the map.

The current vehicle position is either read from gpsd or directly from
NMEA GPS sensors.

The routing engine not only calculates an optimal route to your
destination, but also generates directions and even speaks to you.