FlightCode

Your Swiss army knife for aviation codes.
+ Offline database
+ Airports
+ Aircrafts
+ Country Codes
+ Airlines
+ METAR Codes
+ NOTAM Q
+ Aviation Abbreviations
+ Delay Codes
+ Send suggestions via email!

FlightCode lists ICAO, IATA, FAA and Transport Canada (TC) Codes for airports, aircraft types and airlines. It also lists the country codes/registration informations of an aircraft and comes with a list of aviation abbreviations.
You'll find an integrated maps view for many of the listed airports along with weather information. Aircraft types contain related wikipedia information that you can send out to your friends if you like. In addition, you can mark everything you've seen or even write your own notes (spotting function). Stay in touch with the developer by using the direct feedback and bring in your ideas to make this application better and better. Nice photographs draw a better picture of the topic. Enjoy flying and enjoy FlightCode!

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For passengers:

Do you want to know where that nicely colored aircraft comes from? Look at the country codes of FlightCode.
If you're on your route and want to have a look where the fuel stop is, but you just have shortcuts on your tickets? Look at the IATA airport codes in FlightCode.
Do you like to know what the shortcuts on your luggage labels tell you? Look it up - even when you're running FlightCode offline the database part will work.

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For Pros:

Do you have IATA Codes on your flight schedule and want to know what the new destination on that plan is?
You got smaller airports on your route, on the left and on the right. And you don't want to consult the manual? The offline database of FlightCode can help.
You recognize a callsign like "Yellow Flyer" in an aircraft radio call. Look up the ICAO Callsigns with FlightCode to know what Airline this is...
Your working with METAR or NOTAM Q codes every day? FlightCode could be a nice thing to have then...