RouteHappy (iOS) takes a number of factors such as seat size, baggage fees, and most importantly, feedback from other flyers, to give each potential flight a Happiness Score.
You’ve probably heard of TripIt (iOS, Android, Windows Phone, BlackBerry) – it’s pretty popular. And for good reason. You email TripIt your reservation emails. The service takes all the information in the email and makes an easy-to-read itinerary for you.
With GateGuru (iOS, Android, Windows Phone), you’ll see all the details of your flight – departure and arrival gate, departure time, flight time… but what I like about this one is that it also gives you all the info you need about your airports, including where to get food and rental car information.