FareUpThere - Earn rewards for your feedback on flights
TransforMap - There are Plenty of Alternatives. TransforMap makes them visible.
Skyscanner - Skyscanner.com compares over 1000 airlines to find you the cheapest airfares, fast.
Glympse - Glympse is the easy way to safely share your location in realtime. No sign-up needed.
Eighty App - Convenient travel wishlist app with booking alerts
Facebook Places - Let your friends help you discover restaurants, hotels, museums and more.