(From mtrvl)

Airlines
Air Asia
American Airlines
Austrian Air
Air France
British Airways
Cathay Pacific (EN)
Cathay Pacific (JP)
Continental Airlines
Delta Airlines
Elal Airlines
Indigo Airways
Japan Air
KLM
Lufthansa
Northwest Airlines
QANTAS
Southwest
United Airlines

Restaurants

Restaurant Guide
wcities
Yelp
PLIBA (Please Let It Be Available)

Sights' Guides and Locations
wcities
Google Local
National Parks (worldwide)
Moodmapper (London) text edition
Yelp
Tourist Information - Cornwall, UK
Villa4Vacation (worldwide)
PLIBA (Please Let It Be Available)

Reference
Reverse Phone Lookup (white pages)
Reverse Phone Lookup (yellow pages)
Area codes
Tipping
Currency Rates (from XE.com)
Translation
Wine Encyclopedia
Cocktail Guide

Other:
Shop Amazon.com
FedEx tracking
UPS services
TNT package tracking (UK)