WORLDWIDE WEATHER:
You can check the weather and even see radar maps of domestic and foreign cities around the world.  Do this before you leave so you know what to pack.
www.rainorshine.com

WORLDWIDE SAFETY & SECURITY:
State Department Travel Warnings.
www.travel.state.gov

U.S. CUSTOMS REGULATIONS:
Learn about U.S. customs regulations before you go.
www.customs.treas.gov

WORLDWIDE NEWS AGENCIES:
Read the headlines in the major cities you are visiting. Select a region of the world, the country and the city newspaper you want to read.
www.newsdirectory.com/news

FOREIGN CURRENCY AND INTERNATIONAL ATM LOCATIONS:
Currency exchange gives equivalents of dollars in a foreign currency.
www.xe.net/ucc

WORLDWIDE MASTERCARD LOCATIONS:
www.mastercard.com

WORLDWIDE VISA LOCATIONS:
www.visa.com

STATE DEPARTMENT PASSPORT AGENCY:
USA passport information and on-line application forms.
www.travel.state.gov/passport_services.html

GENERAL COUNTRY INFORMATION:
Provides general information about every country in the world.
www.cdc.gov
www.tripprep.com
 

TRAVEL MEDICAL ORGANIZATIONS:
International Society of Travel Medicine.
www.istm.org

AMERICAN SOCIETY OF TRAVEL MEDICINE AND HYGIENE (ASTMH):
www.astmh.org