Nav Canada  
   Provides navigation services like air traffic control, weather information and many other services.
   http://www.navcanada.ca/

U.S. Sectional Maps On-Line  
   Aviation Sectional maps for educational purposes. Not to be used for flight planning or in-flight navigation.
   http://www.avmap.bizland.com

QDM  
   Flight planning for the private & student pilot made easy. QuDieM Navigator wind computer and free on-line aircraft bookings.
   http://www.qudiem.com/

Penguin Air Electronic AFD and Planning  
   Source for the electronic Airport Facility Directory, approach plates, the FARs and the AIM.
   http://www.penguinair.com/

The Institute of Navigation  
   Non-profit professional society dedicated to the advancement of the art and science of navigation.
   http://www.ion.org/

Royal Institute of Navigation  
   If you have an interest in navigation in its broadest terms - from aircraft Cat III landings though sailing for pleasure to orientation strategies with young children, then you should consider membership of the RIN.
   http://www.rin.org.uk/

AirplaneCharts.Com  
   Aviation VFR and IFR Charts. Sectional and Terminal Charts. NOS Low Altitude Enroute Charts and Approach Plates.
   http://www.airplanecharts.com/

Canso - Civil Air Navigation Services Organisation  
   Exists to ensure the provision of air navigation services for civil aviation communities worldwide.
   http://www.canso.org/

Jeppesen Folding VFR Navigation Plotter  
   A full-sized plotter that tri-folds into shirt-pocket size that features a course line that extends the entire length so you can measure true course from lines of latitude or longitude on the chart. Includes scales for WAC, Sectional and TCA charts calibr
   http://www.jetstreamcat.com/avshop/410111001.html

Flight Plan Information  
   Provides online flight planning and submission. Includes flight navigation log (printable) for generation of computed flight plans, Java applets for the calculation of wind correction and ground speed, mass and balance, density altitude, flight level, cro
   http://www.flightplan.za.net/

Ed Williams' Aviation Page  
   Formulas and on line calculators for aviation navigation.
   http://williams.best.vwh.net/

Aviation Formulary  
   Introduction to the mathematical processes used in navigation including great circle navigation theory.
   http://williams.best.vwh.net/avform.htm

Joe's Navigation Course  
   Aeronautical navigation lessons for a beginner. Provides the lessons with graphics. Available in Dutch and English.
   http://users.telenet.be/joe/

Pocket FMS  
   Shareware flight planning and moving map solution for PC and pocket PC. Instructions and downloads.
   http://www.pocketfms.com/

Aeroplanner  
   Offers online flight planning, sectional charts, and weather outlooks.
   http://www.aeroplanner.com/

Airports En Route  
   Airports directory with flight plan calculator. Computes distance, track, heading, ground speed and time en route between US and Canadian locations.
   http://www.airportsenroute.com

Density Altitude Calculator  
   JavaScipt calculator for pilots. Determines density altitude from the altitude, air temp, altimeter setting and relative humidity.
   http://wahiduddin.net/calc/calc_da.htm

Flycalc  
   Flycalc is a web based, navigation tool for New Zealand based flight plans.
   http://www.flycalc.co.nz/

Jeppesen Sanderson  
   Publisher of flight information, supported by computer flight planning services, aviation weather services, and aviation training systems.
   http://www.jeppesen.com/wlcs/index.jsp

Prescott Arizona Automated Flight Service Station  
   A FAA facility providing weather briefings, flight planning assistance, and aviation information crucial to flight.
   http://www.prcafss.faa.gov

National Air Traffic Services  
   Provides aeronautical information services including let down plates and aviation warnings. Free registration required.
   http://www.ais.org.uk/

NotamPlot  
   Free UK NOTAM plotting software for private pilots. Download, features and user guide. Limited features in free version.
   http://www.notamplot.flyer.co.uk/

FlightLogXL  
   Flight log in Excel. Calculates heading, distance and time based on entered waypoints.
   http://www.flightlogxl.com/