Fgrun is a graphical front end for FlightGear.
It requires fltk also available on SlackBuilds.org.
The airport's list doesn't seem to appear (or ever worse, it dissappears)
when the refresh button is pressed. To (re)build this list execute the
following line once the FlightGear-data is installed:
zcat /usr/share/FlightGear/Airports/metar.dat.gz > \
Maintained by: Diego Pantano
Approved by: Erik Hanson
(the SlackBuild does not include the source)