Find the best seat on ANY plane:
www.seatguru.com

Get up-to-the-minute currency exchange rates:
www.xe.com

List of US Embassies located in other countries:
www.usembassy.gov

List of foreign embassies located in Washington, DC:
www.embassy.org/embassies

Visa requirements for US Citizens traveling to other countries:
www.travisa.com

Passport information/travel warnings/tips for traveling abroad:
www.travel.state.gov

A guide to assist with international calls:
www.countrycallingcodes.com