Engines

All About the Price
Amazon Smile
Amazon Woot
Auction Watch
Best Book Buys
Best Web Buys
Bibliomania Search
Bidder's Edge
BizRate
BizRate
Become
Black Friday
Bookchecker
BookFinder4U
Bottom Dollar
BuyVia
CNET Shopping
CompareNet
Computer Shopper
Consumer Research
Cyber Rebate

Engines

Deal Time
Deal Worker
eBay
PickClick (eBay)
Epinions
Idealo
Flamingo World
Free Shop
NexTag
Overstock
PriceChecker
PricePirates
PriceGrabber
PriceSpy
Shop Wiki
ShopSavvy
Shopping.com
Shopzilla
Street Prices
Tech Bargins
Zappos

Package Tracking

Airborne Tracker
Airborne
DHL Tracker
DHL
FedEx Tracker
FedEx
My UPS
UPS - Tracker
UPS
USPS - Tracker
USPS
USPS - Zip+4

Trader Magazines

Trader Guide
YBB Online