Hitting the road this summer? Forget Yelp and those hotel booking apps -- they're useful, but boring. Instead, pack along these apps to liven things up along the way. You might even learn something. • DISCOVER THE QUIRKY: Consult Roadside America's database of offbeat tourist attractions, and you could marvel at a giant map of Chicago painted on a skyscraper or visit the post office that straddles Texarkana, Ark., and Texarkana, Texas. The iPhone app costs $3 and lets you unlocks one geographic "region" out of seven across the U.S.