Kayak
'Search One and Done' meta-search finds the lowest possible airfare

Mobissimo
Another one-click search engine for airfares drawn from all major sites

Bing
Tells you if ticket prices will rise or fall

Farecompare
Tells you if other travel dates will be cheaper

Airfare Watchdog
Alerts you to special sales and bargains

Truprice
Reveals hidden fees like seat and baggage charges on any air ticket

Seat Guru
Reveals best and worst seats on the plane

Flight Aware
Gives the exact location of any plane at any time

I Fly
Maps out airport amenities

Priceline
Bidding sites like Priceline usually net prices 30 percent lower than all other discounters

Hotwire
Another bargain-basement site; no rent-a-wrecks

TomTom
An iPhone app that works like a GPS for a third of the price

Google Maps
Only the world's most amazing map site

Tripbase
Tell this engine where you're departing from and what your interests are (dining, outdoor, nightlife) and it will recommend destinations on the spot.

Kijubi
A booking engine for outdoorsy activities in eight states

Goby
User-friendly search engine that locates things to do near any US city or major town

Zicasso
A virtual travel agent that will come up with a custom trip for you

Tablet Hotel Consortium
Recommended design hotels, 10 to 30 percent off rack

Luxury Link
Selected blue-chip hotels the world over

Chic Retreats
Small site recommending boutique hotels and villas (mostly non-US)

Mr & Mrs Smith
Small site for boutique and luxury hotels. Strong London content.

Avant Garde Hotels
Small site for stylie hotels, mainly in Europe

Tablet Hotel Consortium
Why stay at a chain when Tablet has stylish hotels at comparable prices?

Expedia
Our workhorse booker for everything

Oyster
Bookings plus reviews of hotels in the US and Caribbean

Wotif
Australian hotel specialist

Raveable
'Meta-site' summarizing reviews from other sites, plus bookings

Uptake
Another site summarizing hotel-room reviews from sources web-wide

Airbandb
Hip private apartments with some user protection

Luxe Home Swaps
Fancy cribs only

Vacationist
Travel and Leisure-affiliated membership site with weekly deals on luxury properties

Jetsetter
Gilt Groupe membership site for last-minute sales on luxury hotels

Family Getaway
Family-friendly destinations

Family Getaway
Family-friendly destinations

Family Getaway
Family-friendly destinations

Family Getaway
Family-friendly destinations

Late Rooms
Where to turn when there's really nothing left. Europe-only

Tripkick
Helps choose individual rooms within hotels

Lonely Planet

In Your Pocket

Rough Guides

Fodor's

Frommer's

Trazzler
Huge, fun database of short editorial blurbs on quirky and cool hotels, activities and more. Semi-user generated.

Gridskipper
Former Gawker guys running an edgy worldwide travel blog

Atlas Obscura
A compendium of the world's most bizarre places (think Portland's Voodoo Doughnut and Wedding Chapel)

Yelp
The ultimate, comprehensive, user-generated database of places to eat, drink, stay and explore

Stay
A DIY guidebook site drawn from a database of tourist attractions

Unlike Guides
Food, fashion and nightlife in select cities

Blackbook Guides
Trendy print mag is hitting the app and web-guide market hard

Approach Guides
In-depth looks at key cultural sites with a focus on art, architecture and history

World Hum
A compendium of stories from top travel writers, which often re-appear in Best American Travel Writing

Gadling
AOL's travel blog has the muscle for new posts every hour

Gypset
Revealing the secrets of the gypsy-jetset set

Go Nomad
What up, South Deerfield. Owner of an offbeat Massachusetts cafe runs a great article site.

Trip Films
Shared videos from world travelers

Got Saga
Social network for travelers. Sign up to post photos, videos and connect with people from around the globe

Lost Girls World
Three Manhattanites dropped out to travel around the world.

Elliot.org
Useful advice from a consumer travel advocate

Don George Blog from a National Geographic travel writer