Aeroplanner

– Offers online flight planning, sectional charts, and weather outlooks.

AirplaneCharts.Com

– Aviation VFR and IFR Charts. Sectional and Terminal Charts. NOS Low Altitude En route Charts and Approach Plates.

Airports En Route

– Airports directory with flight plan calculator. Computes distance, track, heading, ground speed and time en route between US and Canadian locations.

Aviation Formulary

– Introduction to the mathematical processes used in navigation including great circle navigation theory.

Canso – Civil Air Navigation Services Organisation

– Exists to ensure the provision of air navigation services for civil aviation communities worldwide.

Density Altitude Calculator

– JavaScript calculator for pilots. Determines density altitude from the altitude, air temp, altimeter setting and relative humidity.

Ed Williams’ Aviation Page

– Formulas and on line calculators for aviation navigation.

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, cross wind component and other aviation related calculations.

FlightLogXL

– Flight log in Excel. Calculates heading, distance and time based on entered waypoints.

Jeppesen Sanderson

– Publisher of flight information, supported by computer flight planning services, aviation weather services, and aviation training systems.