Ecovian is an online green city guide for hundreds of U.S. cities that provides comprehensive sources of regional green living information. They also provide up to date calendars of upcoming green & environmental events.
Fodor's Travel provides on-line resources for travelers, such as guide books, shopping, dining, hotel, and culture recommendations, as well as articles and reference books.
Fommers.com provides advice, articles and excerpts from the Frommer's Guidebooks. They also have message boards, travel products and services.
lonelyplanet.com provides independent travel advice, guidebooks, author-reviewed accommodations and more. They are also committed to sustainable and responsible travel.
MyTravelGuide provides on-line travel research to help you plan and explore destinations worldwide. They have customer reviews, and information about local hotels, attractions, and destinations.
OneBag is a non-commercial site that offers tips and advice on how to pack and travel light. They also offera list of personally recommended resources for travel.
Project Visa provides a searchable database of visa and embassy information for all countries.
Rough Guides online provides travel and reference information for more than 200 destinations worldwide. They also provide useful and interesting travel apps for for iOS, Android and Windows, such a city guides, travel photography and more.
The CIA World Factbook provides information on the history, people, government, economy, geography, communications, transportation, military, and transnational issues for 267 world entities.
Tripadvisor offers travel advice, reviews on a more than 3.7 million accommodations, restaurants and attractions.