No need to pay top dollar for freeway fill-ups on your next road trips. This app locates the nearest gas station and shows approximate price per gallon; stations and prices throughout the United States and Canada pop up on a map. Free for Android, iPhone, BlackBerry; www.gasbuddy.com
Stuck with a long layover or a flight delay? Meet your new TFF (travel friend forever), a guide to more than 700 of the world’s airport terminals. (It found us rocking chairs near a live pianist at Charlotte-Douglas International Airport, which helped make a six-hour delay bearable.) Find food, terminal, and gate locations, restrooms, shops, and other services. Free for Android, iPhone, iPad; www.ifly.com
The king of crowdsourcing, Yelp’s opinionated bunch of 50 million contributors offer their insights on restaurants, hotels, and services. Mostly, we use it to get advice for eating on the fly in an unfamiliar neighborhood and are rarely disappointed. Free for Android, BlackBerry, iPhone, Windows Phone; www.yelp.com/yelpmobile
Diane Bair and Pamela Wright can be reached at email@example.com.