50 Best iPhone Apps 2011

Filling up your new iPhone? Just hoping to make the one you already have even better? These are the apps you don't want to be without.

Kayak

kayak

Kayak, the popular meta-search website, has created an app that makes it easy to search for hotels, flights and car rentals even while you're away from your desk. Budding road warriors will appreciate the airport information section, price alerts and fee table, while bean counters will appreciate that the app comes in a free, regular version. High flyers wanting to book first- or business-class tickets will need the Pro version, however, priced at $1.99.

See 10 ways to stay connected while on the road.

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