JetRadar - Compare flights from hundreds of airlines & travel agencies
Customer Feedback Portal - Ask customers what you should build next
Skyscanner - Skyscanner.com compares over 1000 airlines to find you the cheapest airfares, fast.
Feedback Tools - Curated directory of tools for getting all the feedback
FareUpThere - Earn rewards for your feedback on flights
Feedback Fish - Collect feedback & make your customers happy.