Air & Car
Yapta
www.yapta.com
Yapta tracks Airline Prices for you. If the price drops, it alerts you so you can get a refund/voucher on the ticket you've already purchased or you can go ahead and buy that low fare ticket. Great site!
Trippish-Weather to go.
www.trippish.com
Get driving directions and weather information for your car trip.
Gas Buddy
www.gasbuddy.com
Find the cheapest gas prices available.
Farecast
www.farecast.com
Know when to fly, know when to buy.
Smarter Travel
www.smartertravel.com
Inspiration and Information. Flight deals/Compare Prices/Travel Advice.
Low Fares
www.lowfares.com
Discount travel websites made easy.
Travelocity
www.travelocity.com
Find flight/hotels/car rentals.
Orbitz
www.orbitz.com
Find flight/hotel/car rentals.