DATABASES, KNOWHOW
Airliner productionlists
Airline logos, aircraft specifications
Company & aircraft directory
Aircraft Operator Agencies Designator search engine
ICAO Doc. 8585 (via Eurocontrol)
Aircraft Type Designators search engine
ICAO Doc. 8643
Airliner production lists
Aircraft registration lookup
The Worlds Airlines: Past, Present & Future
Airline directory; loads of data
Production lists and histories of most major airliners.
Airport Details & Navigation Charts, Navaid Details. etc.
ATDB - AeroTransport Data Bank
Commercial database with daily updates.
Commercial software with weekly updates. (I use it since years to organize my logs and images)
DINS - Defense Internet NOTAM Service
Reference, weather, links
IATA and ICAO Airline and Airport Codes
Searchable Directory
Planespotters.net Airliner Production Lists
Production lists of Russian aircraft.
Airline seat maps
All kinds of abbreviations and codes; links
Airports, navaids
Ressourceful directory of the World's Airlines and Operators.