Gpsdrive is a car (bike, ship, plane) navigation system. Displaying your position on a map and a lot of other functions are implemented. It works with vector maps from http://www.OpenStreetMap.de/
Beam and it's follow-on I-Beam are sets of programs to produce
coverage charts of radio sources. It has been used for RADAR, DME,
VOR and various communications sources specific to aviation. However, it is also valid for cell phone, TV and radio towers
wfb2sql is a Perl script that extracts information from the CIA World Factbook and creates SQL statements for IBM DB/2, PostgreSQL or MySQL. This data builds a perfect database for learning and teaching SQL.