Domenick Buonamici, an editor of WikiCostofLiving.org has compiled a list of eight online travel tools:
www.Xe.com: To avoid getting ripped off by shady currency changers right when you cross boarders, make sure you know what the exchange rates are before you go, using this excellent website.
www.WikiCostofLiving.org: The key to traveling on a budget is choosing where to travel. Costs of everyday things like lodging vary greatly from country to country and it is very important to know what you are getting yourself into before you go. This website, in the form of a wiki, so anyone can edit it, is constantly being updated by travelers around the globe to give fellow travelers the most complete and best updated cost of travel index in the world.
www.Virtualtourist.com: This website is full of reviews and user-recommended top 10 lists for just about every location on the planet, an indispensible tool for any traveler.
Google maps: Any traveler loves maps. And Google maps are the easiest and clearest maps to use on the internet.
www.Wikitravel.org: This user-updated wiki is truly a guidebook alternative, with up to date info on everything from things to do in a given location to lodging and transportation options.
www.Hostelbookers.com: Choose from the widest selection of hostels available on the net and make reservations for hostels online without any extra fees, to ensure you have a bed when you get to your destination. It is also an excellent tool to use to see how much lodging will cost in a given country when you are still in the research phase.
www.Couchsurfing.com: The site provides travelers with contact information to stay in homes for free while traveling.
http://www.travelblog.org/: Unbiased, user-generated travel recommendations from real travelers. This site is full of personal travel blogs should be firmly etched into any traveler’s trip preparation.