GPSBabel - convert, upload, download data from GPS and Map programs
Cockpit and Small Boat GPS
Cessna 172 G-BSEP performance data - David Williams flying homepage
C172 145hp take off calculator, weight & balance calculator
Great Circle Mapper
The Airline Codes Website
links to national aircraft registers and other stuff too
Airline Seating Charts, Best Airplane Seats - SeatGuru
GPX Aviation Waypoint Generation
many countries, many aviation waypoint types
YAWS @ actiVitae.com
oa2gm - airspace maps translator
Freeflight Software
notam plotter
Freeflight Airspace
airspace plotter
Convert OpenAir - GoogleMaps
GPX Waypoint Generation