FareUpThere - Earn rewards for your feedback on flights
Customer Feedback Portal - Ask customers what you should build next
RoadGoat - Map where you've traveled. Get matched with best places to go next!
Feedback Fish - Collect feedback & make your customers happy.
Skyscanner - Skyscanner.com compares over 1000 airlines to find you the cheapest airfares, fast.
Roadmap - Collision avoidance for projects and people