Airliners.net -- The Best Airplane Information, Aviation Photos and Aviation News!
An excellent source for aircraft images with a small technical area.Their main feature is the photo database where aviation photographers from all over the world display their work. They currently have 1,481,515 (Ref. 19 SEP 2009) photos online! with hundreds added daily and serve close to 2000 photographers, which makes them the biggest aviation photography site online.
 Airliners.net is a private, not for profit website.
Air ACI -Airports Council International -- Airports Council International is the only global trade representative of the world’s airports. Established in 1991, ACI represents airports interests with Governments and international organisations such as ICAO, develops standards, policies and recommended practices for airports and provides information and training opportunities to raise standards around the world. This section provides you with information on the structure and background of ACI.
The voice of the World's Airports:.  AC Alert / Latest Press Relesasses / Latest Speeches / New ACI Publications / Events / World Reports 2009 / Airport Job Search / ACI Airport World Online.
Airquality.com - -the world's largest choice of Airline and Airport Reviews SKYTRAX offers millions of different ratings for   Airlines, Airports, Airline seats, Airline lounges - and more. Check airline Product and Service standards at the Official Airline Star Ranking® Guide
Airsafe.com  -- Critical information for the traveling public. Safety, accidents, fatal events.
This site has been in operation since 3 July 1996, just two weeks before the crash of TWA Flight 800. Since its inception, the goals of AirSafe.com have been to provide the aviation safety community and the general public with factual and timely information on events that involve the deaths of airline passengers. AirSafe.com also provides fatal event information by airline and aircraft model, as well as information about current aviation safety issues.
Air Trafic.eu -- Routeplanner in Europe, Airline Tickets search 
Air-valid.com -- collecte toutes les informations publiques disponibles sur les compagnies aériennes, afin de constituer cette base d'informations à destination des voyageurs. Les compagnies aériennes ont la faculté de fournir à AIR VALID des mises à jour de ces informations qui sont ensuite vérifiées par AIR VALID. Chaque information est restituée avec une «Source» et une période de «Référence». Les sources d'informations sont les compagnies aériennes. Cette base est enrichie de notes de la part des voyageurs et des actualités de la rédaction AIR VALID, sur la base des communiqués de presse des compagnies aériennes.
Des infprmations simples sur plus de 1220 compagnies aériennes avec mise à jour par les compagnies et les quelques 110000 avis/opinions de voyageurs après un vol.
Annuaire des compagnies / Liste noire / Crash et incidents / informations utiles et liens.
Columbus Airport Guide -- Welcome to World Travel Guide: the most comprehensive guide to global travel on the web. We have travel guides to every country in the world, as well as city, ski, beach, cruise and airport guides. Click on Travel Essentials for weather forecasts, a world clock, our World Events Guide, attraction guides (like Chessington World of Adventures), and more.  /Flughafen Führer / Guia mundial de aeropuertos .
Fahrplan-online.de --
The big worldwide database of public transport timetable information
Fahrplan-Online ist die große Übersicht über Fahrplanauskünfte
LogLink -- a directory of logistics resources on the internet. Find logistics companies, logistics providers, supply chain consultants, supply chain management, freight forwarders, freight companies, trucking companies, moving companies, movers, shipping companies, air freight, air carriers, ocean freight, ship lines, rail freight, third party logistics providers, warehouses, freight transportation and more. Logistics World is your guide to sites related to logistics, logistics management, freight, transportation, supply chain management, warehousing, distribution, maintenance, manufacturing, management, travel, tourism, reliability, business, and quality sites on the web.

OAG Airline Codes
OAG Airport Informations -- flight duration, direct destination from/to, terminal finder, airlines routes, find destination by flight time, airlines by route, direct destination to/from, first/last flights of the days, who am I really flying with.
OAG City and Airport Codes -- use this tool to find the two letter code for an airline or find an airline name from a code.
OAG Conversion Calculator -- use this tool to perform common metric/imperial conversions

http://www.oag.com/travel-guides/airline-airport/
http://www.oag.com/travel-guides/airline-airport/airport-information/
http://www.oag.com/travel-guides/airline-airport/airline-alliances/
http://www.oag.com/travel-guides/air-route-info/
http://www.oag.com/travel-guides/destination/
http://www.oag.com/travel-guides/hotel/
http://www.oag.com/travel-guides/travel-tips/TravelDocuments/
http://www.oag.com/travel-news/oag-travel-news/

APTA American Public Tranportation Association --
World Airport Codes --- seach motor with airport details
World Airport Codes Database --search for airports by code or find an individual airport's identifier code. Includes links to other airport codes resources.