Major Airports Worldwide. Live.
http://www.flightradar24.com/
Flight Radar 24 for iPhone and iPad
Major Airports Worldwide. Live.
http://itunes.apple.com/us/app/flightradar24-free/id382233851?mt=8
Radar Virtuel
European Flights. Live, updated every 30seconds
http://www.radarvirtuel.com/
GMAPS Flight Tracker
Major US Airport Flights. Live, updated every 40 seconds
http://gmapsflighttracker.com/
Aeroseek
Live, updated every 60 seconds
http://www.aeroseek.com/webtrax/airnav.html
Other Air Traffic Stuff...
Live Air Traffic Control Radio Chatter
Listen to streaming World Airport frequencies, Live
http://www.liveatc.net/topfeeds.php
Airport Diagrams
US Airport runways with taxiing lanes.
http://www.faa.gov/airports/runway_safety/diagrams/
