Skyscanner - Skyscanner.com compares over 1000 airlines to find you the cheapest airfares, fast.
WiFi Map - A crowdsourced list of routers and passwords
Kiwi.com - Find and book the best low-cost flights all around the world
Instabridge - Crowdsourced free wifi (now on Android)
App in the Air - The perfect companion for everyone taking a flight.
WifiMapper - Find free WiFi anywhere in the world