"Hi Jack. Can't Talk. Emergency." (A method of recalling the codes 7500, 7600, 7700. Thanks to M.
Aviation Links and other stuff
The most comprehensive weather provider in the world. Worldwide converage with no fees or subscritions.
A free service providing Canadian and Atlantic weather data. International flights orginating in Canada require a subscription based provider (Jeppesen) or the use of the the FAA's weather service. Some links to the US system are provided.
Similar to the FAA but a bit difficult to navigate.
Offers a barebones free service to UK pilots flying within the UK. All other services are offered an a subcrition basis.
Math and Physics for Pilots
Boeing 737 - 800 Flight Planning and Performance Manual