xgps is a simple test client for gpsd with an X interface. It displays
current GPS position/time/velocity information and (for GPSes that
support the feature) the locations of accessible satellites.

xgpsspeed is a speedometer that uses position information from the GPS.
It accepts an -h option and optional argument as for gps, or a -v option
to dump the package version and exit. Additionally, it accepts -rv
(reverse video) and -nc (needle color) options.